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Applications Information (Continued) Complete Acoustically Coupled 300 Baud Modem TLA 39 150k D.l pF OSI TlIA SQT ":' MODE SELECT Rl EXI ALB RXA2 RXAI MM74HC943 D/~ ORIGINATE ANSWER TRANSMITTED DATA ~ +5V RECEIVED DATA .-----IFTLC T 1PF 0.1 "" L..--------.... - ... ""'1p-.... -.,..-.... --1 8NOA 2.2X 330 LED ~I--W,,""""".- +5V CARRIER DETECT INDICATION Nota: The efficiency of the acoustic coupling will selthe values of Rl and R2. TL/F/5349-6 5-15
~ r-------------------------------------------------------------------------------------, ~ ~ :1. ~National ~ Semiconductor J-LAV22 1200/600 bps Full Duplex Modem General Description The /LAV22 1200/600 bps single-chip modem IC performs all signal processing required for a CCITT V.22 Alternative B-compatible modem, while typically dissipating only 40 mW. Handshaking protocols, and dialing and mode control functions can be serviced by a general purpose single chip microcontroller. These two chips, along with several components to handle the control and telephone line interfaces, provide a cost effective approach compared to either discrete or integrated chip set designs. The modem chip performs the required V.22 modulation, demodulation, buffering, filtering, scrambling, descrambling and control and self-test functions, as well as additional functional enhancements. A novel switched capacitor modulator and a digital coherent demodulator provide 1200 bps and 600 bps QPSK operation. Switched-capacitor filters provide channel isolation, spectral shaping, fixed compromise equalization, and guard tone rejection. Additionally, the receive filter and energy detector may be configured for callprogress tone detection (dialtone, busy, ringback, voice) in the 3S0 Hz to 8S0 Hz band, providing the front end for a smart V.2S-compatible dialer. On-chip tone generators provide DTMF dialing, 1300 Hz calling tone, 2100 Hz answer tone, and selectable 550 Hz and 1800 Hz guard tones. /LAV22 also supports the Extended Signaling Rate Option (up to 2.3% overspeed in asychronous mode) and provides on-chip handshaking for Remote Digital Loop (V.S4/Loop2). The /LAV22 is fabricated in Double-Poly Silicon Gate CMOS process. Features • Performs all V.22 alternative B signal processing • Very low power dissipation (40 mW typ.) • Excellent bit error rate (BER) performance • Interfaces to a microcontroller or bus for mode and handshake control • Selectable extended signaling rate range • On-chip tone generators provide: - DTMF dialing - 1300 Hz calling tone - 2100 Hz answer tone - Selectable SOO Hz and 1800 Hz guard tones • Call progress tone detection • Supports V.S4 diagnostics on-chip - Loop 1 (local digital loop) - Loop 2 (remote digital loop) - Loop 3 (analog loop) • On-chip oscillator uses 3.6864 MHz crystal • Requires ± SV • Requires few external components • Available in three 28-lead packages: - Ceramic DIP -Plastic DIP - Plastic Leaded Chip Carrier (PLCC) Connection Diagram 28·Lead DIP/28·Lead PLCC SLlM- 1 LlM- 2 RXIN- 3 DOT- 4 ETC- 5 SYNC- 6 EDET- 7 HS- 8 SCRM- 9 TXD- 10 XTL2- 11 XTL1- 12 SCR- 13 RXD- 14 281-Voo 271-Vss 261-AGND 251-TXO 241-C/A 231-TXSQ 221-SCT 211-MODI 20l-MOD2 191-TEST 181-DGND 171-HSK2 161-HSKl 151-RLST 'Ceramlc Dual-In-Line Package Order Number /LAV22DC See NS Package Number F28B 'Molded Dual-In-Line Package Order Number /LAV22PC See NS Package Number N28B 'Plastic Leaded Chip Carrier Order Number /LAV22QC See NS Package Number V28A Top View Note: 28-Lead PLCC (Lead numbers same as 28-Lead DIP) TL/H/9415-1 "For most current package information, contact product marketing. For most current order information, contact your local sales office. S-16
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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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~ ..,. r---------------------------
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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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(W) r------------------------------
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MUX~ __________________ The BIPLAN
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U) ,-------------------------------
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An EPROM implementation was selecte
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MASTER MUL TIPLEXING/DE-MUL TIPLEXI
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AN·496 '" 0, '" (U17/ (U23/6) TO 5
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AN-496 t W19 ~ J2-43 I' [; 0 J2-42
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AN·496
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DP8342/DP8343 HIGH SPEED INTERFACE
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2.0 Connection Diagram A13- 12 A12-
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3.0 Pin Descriptions (Continued) Si
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~ ~ 4.0 Electrical Specifications (
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4.0 Electrical Specifications (Cont
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~ ~ 4.0 Electrical Specifications (
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c( '
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~L ______________ ___ ~ ~ 4.0 Elect
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5.0 Instruction Set Overview (Conti
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6.0 Instruction Set Reference (Cont
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~ C') 6.0 Instruction Set Reference
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! 6.0 Instruction Set Reference (Co
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~ ~ 6.0 Instruction Set Reference (
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== ~ 6.0 Instruction Set Reference
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7.0 CPU Registers (Continued) BIT I
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7.0 CPU Registers (Continued) BIRO
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7.0 CPU Registers (Continued) 76543
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7.0 CPU Registers (Continued) BIT D
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7.0 CPU Registers (Continued) BIT D
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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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~I tn tn ...._,__'RS A RS, RSC IMEM
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~ 01 CO RASM stat. TCU stat. CLK-OU
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~ ~ I\~"'''' I 'ow = "[OW2-0) , RS
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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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m . r------------------------------
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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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Page 490 and 491: A Comparison of the I NS8250, NS 16
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Page 494 and 495: cessed (see Figure 4), The output o
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Page 508 and 509: 6.0 Connection Diagrams Dual-In-Lln
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Page 512 and 513: 9.0 Registers (Continued) Bit three
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Page 519 and 520: Section 5 Contents MM74HC942 300 Ba
Page 521 and 522: Absolute Maximum Ratings (Notes 1 &
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Page 525 and 526: Applications Information (Continued
Page 527 and 528: Absolute Maximum Ratings (Notes 1 &
Page 529 and 530: Description of Pin Functions Pin No
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Page 535 and 536: Electrical Characteristics Unless o
Page 537 and 538: C'I 5 Pin Descriptions (Continued)
Page 539 and 540: IlAV22 RXIN LOCAL OSCILLATOR (L.O.)
Page 541 and 542: Functional Description (Continued)
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Page 545 and 546: Absolute Maximum Ratings* If Milita
Page 547 and 548: Electrical Characteristics unless o
Page 549 and 550: Functional Description* (Continued)
Page 551 and 552: ,...A212AT RECEIVE FILTER p--------
Page 553 and 554: TABLE III. Remote Digital Loopback
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Page 561 and 562: .,... U) Z 3020 LPRINT USING" 1111
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Page 570 and 571: Section 6 Transmission Line Drivers
Page 572 and 573: ~National ~ Semiconductor Transmiss
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Page 576 and 577: J?'A National ~ Semiconductor OS 14
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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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t-------------I:..':::~"':I'-------
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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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~ National ~ Semiconductor
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