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5.0 Instruction Set Overview (Continued) Integer Arithmetic Instructions The integer arithmetic instructions operate on B-bit signed (two's complement) binary numbers. Two arithmetic functions are supported: Add and Subtract. Three versions of the Add and Subtract instructions exist: operand ± accumulator, operand ± accumulator ± carry, and immediate operand ± operand. The first two versions support both the register and indexed addressing modes for the destination operand. These two versions also allow the specification of a separate register or data address for the destination operand so that the sources may retain their integrity; (i.e., true three-operand instructions). Note that the currently active "B" register bank selects which accumulator is used in these instructions. The third version, immediate operand ± operand, only supports the register addressing mode for the destination operand with the register as both a source and the destination. Table VI lists the integer arithmetic instructions along with their variations. Logic Instructions The logic instructions operate on B-bit binary data. A full set of logic functions is supported by the BCP: AND, OR, eXclusive OR, and Complement. <strong>Al</strong>l the logic functions except complement allow either an immediate operand or the currently active accumulator as an implied operand. Complement only allows one register operand which is both the source and destination. The other logic instructions include the following addreSSing modes: register, indexed, and immediate. As with the integer arithmetic instructions, the integrity of the sources may be maintained by specifying a destination register which is different from the source. Table VII lists all the logic instructions. TABLE VI. Integer Arithmetic Instructions Syntax I nstruction Operation Addressing Modes ADD ADDA ADDA ADCA ADCA SUB SUBA SUBA SBCA SBCA n, rsd Rs, Rd Rs, [mir] Rs, Rd Rs, [mir] n, rsd Rs, Rd Rs, [mir] Rs, Rd Rs, [mir] register + n ---+ register Rs + accumulator ---+ Rd Rs + accumulator ---+ data memory Rs + accumulator + carry ---+ Rd Rs + accumulator + carry ---+ data memory register - n ---+ register Rs - accumulator ---+ Rd Rs - accumulator ---+ data memory Rs - accumulator - carry ---+ Rd Rs - accumulator - carry ---+ data memory Immediate, Limited Register Register, Register Register, Indexed Register, Register Register, Indexed Immediate, Limited Register Register, Register Register, Indexed Register, Register Register, Indexed TABLE VII. Logic Instructions AND ANDA ANDA OR ORA ORA XOR XORA XORA CPL Syntax n, rsd Rs, Rd Rs, [mir] n, rsd RS,Rd Rs, [mir] n, rsd Rs, Rd Rs, [mir] Rsd Note: & ~ logical AND operation I ~ logical OR operation GI = logical exclusive OR operation r = one's complement Instruction Operation register & n ---+ register Rs & accumulator ---+ Rd Rs & accumulator ---+ data memory register I n ---+ register Rs I accumulator ---+ Rd Rs I accumulator ---+ data memory register Ell n ---+ register Rs Ell accumulator ---+ Rd Rs Ell accumulator ---+ data memory register ---+ register Addressing Modes Immediate, Limited Register Register, Register Register, Indexed Immediate, Limited Register Register, Register Register, Indexed Immediate, Limited Register Register, Register Register, Indexed Register 2-93
5.0 Instruction Set Overview (Continued) Shift and Rotate Instructions The shift and rotate instructions operate on any of the 8-bit CPU registers. The BCP supports shift left, shift right, and rotate operations. Table VIII lists the shift and rotate instructions. Comparison Instructions The BCP utilizes two comparison instructions. The CMP instruction performs a two's complement subtraction between a register and immediate data. The BIT instruction tests selected bits in a register by ANDing it with immediate data. Neither instruction stores its results, only the ALU flags are affected. Table IX lists both of the comparison instructions. Program Flow Instructions The BCP has a wide array of program flow instructions: unconditional jumps, calls and returns; conditional jumps, calls, and returns; relative or absolute instruction addressing on jumps and calls; a specialized register field decoding jump; and software interrupt capabilities. These instructions redirect program flow by changing the Program Counter. The unconditional jump instructions support both relative instruction addressing, the (JuMP instruction), and absolute instruction addressing, (the Long JuMP instruction), using the following addressing modes: Immediate, Register, Absolute, and Indexed. Table X lists the unconditional jump instructions and their variations. The conditional jump instructions support both relative instruction addressing and absolute instruction addressing using the Immediate and Absolute addressing modes. The conditional relative jump instruction tests flags in the Condition Code Register, {CCR J. and the Transceiver Status Register, (TSR). Two possible syntaxes are supported for the conditional relative jump instruction; see Table XI. Table XII lists the various flags "f" that the conditional JMP instruction can test and Table XII I lists the various conditions "cc" that the Jcc instruction can test for. Keep in TABLE VIII. Shift and Rotate Instructions Syntax I nstruction Operation Addressing Mode SHL Rsd,b Register SHR Rsd,b ~ i i i i i i i III ~o Rod i i i i i i i o~ • Rod ~ Register 4 i i i i i i i ROT Rsd,b III ~ Register Note: "b" = the number of bit shifts/rotates to perform. Rod Syntax TABLE IX. Comparison Instructions Instruction Operation Addressing Mode CMP rs, n register - n Limited Register BIT rs, n register & n Limited Register Note: & = logical AND operation TABLE X. Unconditional Jump Instructions Syntax Instruction Operation Operand Range Addressing Mode JMP n PC + n (sign extended) ~ PC -128, +127 Immediate JMP Rs PC + Rs (sign extended) ~ PC -128, +127 Register LJMP nn nn~PC O,64k Absolute LJMP [lrl Ir~PC O,64k Indexed Note: PC = Program Counter; contents initially points to instruction following jump. 2-94
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~ National ~ Semiconductor 400014 R
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TRADEMARKS Following is the most cu
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II) c ~ ~National ~ ~ Semiconductor
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Table of Contents (Continued) Secti
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Alpha-Numeric Index(continUed) DS36
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Section 1 Local Area Networks IEEE
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~National ~ Semiconductor DP8390C/N
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3.0 Functional Description (Continu
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5.0 Pin Descriptions (Continued) BU
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6.0 Direct Memory Access Control (D
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7.0 Packet Reception (Continued) Re
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8.0 Packet Transmission (Continued)
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10.0 Internal Registers (Continued)
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12.0 Loopback Diagnostics (Continue
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13.0 Bus Arbitration and Timing The
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13.0 Bus Arbitration and Timing (Co
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15.0 Switching Characteristics AC S
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15.0 Switching Characteristics (Con
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AC Timing Test Conditions Input Pul
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2.0 Block Diagram COL CRS PROTOCOL
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4.0 Transmit/Receive Packet Encapsu
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5.0 Pin Descriptions (Continued) BU
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7.0 Packet Reception (Continued) fo
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7.0 Packet Reception (Continued) Er
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9.0 Remote DMA The Remote DMA chann
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11.0 Initialization Procedures (Con
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13.0 Bus Arbitration and Timing The
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15.0 Switching Characteristics AC S
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AC Timing Test Conditions Input Pul
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2.0 Block Diagram TRANSCEIVER CABLE
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PCC Connection Diagram 39.0. 39.0.
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6.0 Absolute Maximum Ratings Recomm
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9.0 Timing and Load Diagrams (Conti
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2.0 Block Diagram COAX CABLE r ____
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6.0 Absolute Maximum Ratings (Note
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I: • • • • • • Interrup
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PAL20LB Decode and DMA Interface Lo
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~ U16/8 R1 R1,R2=4.7k.o. Note: For
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Although Cheapernet is intended for
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The transmitted packet from the SNI
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Truth Table for Various Collision D
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CHEAPERNET APPLICATION WITH THE DP8
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DP8390 Network Interface Controller
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ping between the received address a
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If the current local DMA address ev
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6.2 Dual Port Memory One popular me
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StarLAN With The DP839EB Evaluation
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SUPPORTING DOCUMENTS The following
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Pulse Transformer U3 .----. j " "P>
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ELECTROSTATIC DISCHARGE TEST (ESD)
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Section 2 Contents DP8340INS32440 I
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.. 0 C'I C") en .... z 0 C") GO Go
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~ 'OIl' N CO) (J) Z .... o 'OIl' CO
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Timing Characteristics Oscillator F
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Timing Waveforms (Continued) TA REG
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.. ... ~ ~National ~ ~ Semiconduc
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Detailed Functional Pin Description
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Message Format (Continued) DATA REC
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Timing Characteristics (Notes 2, 6,
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Timing Waveforms (Continued) 4T±(T
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Typical Applications (Continued) +5
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Timing Characteristics (Continued)
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Functional Timing Waveforms (Contin
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Typical Applications (Continued) DA
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C") "Ot "Ot N C") en ...... z C") "
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Absolute Maximum Ratings (Note 1) I
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Page 211 and 212: MUX~ __________________ The BIPLAN
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Page 219 and 220: An EPROM implementation was selecte
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8.0 Remote Interface and Arbitratio
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~ ~ HASM state TCU state eLK-OUT RE
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~ 8l HASM stat. TCU stat. CU- C» b
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10.0 Transceiver (Continued) (a) 32
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10.0 Transceiver (Continued) TABLE
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10.0 Transceiver (Continued) dotted
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10.0 Transceiver (Continued) TABLE
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10.0 Transceiver (Continued) {also
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Decoding Bit Fields with the JRMK I
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Receiver Interrupts/Flags for the D
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****************DA ISR*************
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"Interrupts"-A Powerful Tool of the
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TABLE II. (lCR) Interrupt Mask Bits
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Running the DP8344 with wait states
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» z I U'I Q 01:00 INSTRUCTION ADDR
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WHY EPROM SOFT-LOAD? In a stand-alo
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RESET ~. Timing at Beginning of Ins
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.. I CRYSTAL ~~~.~ I UP TO 64K OP83
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The roll-off frequency, Fro, should
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ceives messages whose first frame a
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RECEIVER INTERRUPT The receiver int
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JMP n LJMP n JMPR Rs JMPI Ptr JRMK
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00044 F90a :J- 226 Z • 227 MOVE A
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l> Z 00074 80BD 2'18 en • 00075 0
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Section 3 ISDN Components
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Introduction To National Semiconduc
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NSC Solutions for Layers 2 and 3 Na
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NSC Solutions: Systems Level Basic
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~National ~ Semiconductor PRELIMINA
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ISDN DEFINITIONS "B" Channel, or DS
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~ '" TE2 UP TO 8 TERMINALS -
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Section 4 Contents INS8250/INS8250-
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3.0 AC Electrical Characteristics T
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. ID
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5.0 Block Diagram INTERNAL DATA IUS
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6.0 Pin Descriptions (Continued) In
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8.0 Registers (Continued) and 1, on
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8.0 Registers (Continued) 8.5 INTER
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~ &I) o N m Z ::::: o &I) 'Of' o co
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~ Lt) o N co U) Z ::::: o Lt) '
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4.0 Timing Waveforms (Continued) Re
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6.0 Pin Descriptions (Continued) Re
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8.0 Registers The system programmer
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8.0 Registers (Continued) 8.3 PROGR
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8.0 Registers (Continued) Table II
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9.0 Typical Applications (Continued
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Table of Contents 1.0 ABSOLUTE MAXI
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3.0 AC Electrical Characteristics T
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4.0 Timing Waveforms (Continued) Wr
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5.0 Block Diagram AO A, A2 CSD CSI
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6.0 Pin Descriptions (Continued) tr
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... .I>. '" Bit No. TABLE II. Summa
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8.0 Registers (Continued) 8.3 PROGR
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8.0 Registers (Continued) When the
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'" .j>. 01 PHil This shows the basi
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3. The Rx FIFO will hold 16 bytes r
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NS16550A E-J r-o ..... IRQ4 ICU CPU
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TITLE 550APP.ASM - NS16550A INITIAL
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3.0 Board to Board Communications w
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DIAPPS.ASM Flow Chart l> z • ~ CO
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» z I "" CD RDAI: DISABLE IRTS, SE
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COMPARE: SET UP COMPARE BUffER POIN
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.set iCu imsk,lO *aO • set icu -c
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holdloop: nop # br hold loop # # #*
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# msint: save [rO,rl,r2,r3] # movd
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#3/30/B7••••• D2APPS.ASM
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# #*************************** 1655
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A Comparison of the I NS8250, NS 16
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cessed (see Figure 4), The output o
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AC Electrical Characteristics T A =
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~National ~ Semiconductor \ J micro
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1.0 Absolute Maximum Ratings 2.0 Op
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4.0 AC Electrical Characteristics (
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5.0 Timing Waveforms (Continued) ii
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6.0 Connection Diagrams Dual-In-Lln
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8.0 Block Diagram CPU INTERFACE INT
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9.0 Registers (Continued) Bit three
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Section 5 Contents MM74HC942 300 Ba
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Absolute Maximum Ratings (Notes 1 &
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fj ::z:: ~ :::IE :::IE ~ ,---------
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Applications Information (Continued
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Absolute Maximum Ratings (Notes 1 &
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Description of Pin Functions Pin No
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Electrical Characteristics Unless o
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C'I 5 Pin Descriptions (Continued)
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IlAV22 RXIN LOCAL OSCILLATOR (L.O.)
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Functional Description (Continued)
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Functional Description (Continued)
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Absolute Maximum Ratings* If Milita
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Electrical Characteristics unless o
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Functional Description* (Continued)
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,...A212AT RECEIVE FILTER p--------
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TABLE III. Remote Digital Loopback
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Section 6 Transmission Line Drivers
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~National ~ Semiconductor Transmiss
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~National ~ Semiconductor OS 1488 Q
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J?'A National ~ Semiconductor OS 14
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~National ~ Semiconductor DS26C31 C
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~National ~ Semiconductor DS26C32C
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~National ~ Semiconductor DS34C86 Q
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~National ~ Semiconductor PRELIMINA
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~National ~ Semiconductor DS1692/DS
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~National ~ Semiconductor DS75150 D
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~National ~ Semiconductor DS75176A/
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~National ~ Semiconductor DS8922/22
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~National ~ Semiconductor DS96172/~
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~National ~ Semiconductor DS961771
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~National ~ Semiconductor DS9637 AI
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• I .----------------------------
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Section 7 Physical Dimensions
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~National ~ Semiconductor All dimen
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NS Package N16A N16A(REV E) 0.092 X
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0.11M-0.118 (2.642-2.9971 .. ••
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NOTES
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~National ~ Semiconductor Bookshelf
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RELIABILITY HANDBOOK-1986 Reliabili
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NATIONAL SEMICONDUCTOR CORPORATION
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NATIONAL SEMICONDUCTOR CORPORATION
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