Atmel AT89C51ID2 Data Sheet - Keil

More documents

Recommendations

Info

Full Chip Erase The ISP command "Full Chip Erase" erases all User Flash memory (fills with FFh) and sets some bytes used by the bootloader at their default values: BSB = FFh SBV = FCh SSB = FFh and finally erase the Software Security Bits The Full Chip Erase does not affect the bootloader. Checksum Error When a checksum error is detected send ‘X’ followed with CR&LF. 128 AT89C51ID2 4289A–8051–09/03
Flow Description 4289A–8051–09/03 AT89C51ID2 Overview An initialization step must be performed after each Reset. After microcontroller reset, the bootloader waits for an autobaud sequence ( see section ‘autobaud performance’). When the communication is initialized the protocol depends on the record type requested by the host. FLIP, a software utility to implement ISP programming with a PC, is available from the Atmel the web site. Communication Initialization The host initializes the communication by sending a ’U’ character to help the bootloader to compute the baudrate (autobaud). Figure 51. Initialization Host Bootloader Autobaud Performances The ISP feature allows a wide range of baud rates in the user application. It is also adaptable to a wide range of oscillator frequencies. This is accomplished by measuring the bit-time of a single bit in a received character. This information is then used to program the baud rate in terms of timer counts based on the oscillator frequency. The ISP feature requires that an initial character (an uppercase U) be sent to the AT89C51ID2 to establish the baud rate. Table show the autobaud capability. Table 94. Autobaud Performances Init communication If (not received "U") Else Communication opened "U" "U" Performs autobaud Sends back U character Frequency (MHz) Baudrate (kHz) 1.8432 2 2.4576 3 3.6864 4 5 6 7.3728 2400 OK OK OK OK OK OK OK OK OK 4800 OK - OK OK OK OK OK OK OK 9600 OK - OK OK OK OK OK OK OK 19200 OK - OK OK OK - - OK OK 38400 - - OK OK - OK OK OK 57600 - - - - OK - - - OK 115200 - - - - - - - - OK Frequency (MHz) Baudrate (kHz) 8 10 11.0592 12 14.746 16 20 24 26.6 2400 OK OK OK OK OK OK OK OK OK 129
Page 1 and 2:
Features 80C52 Compatible - 8051 In
Page 3 and 4:
Block Diagram Figure 1. Block Diagr
Page 5 and 6:
Table 2. C51 Core SFRs 4289A-8051-0
Page 7 and 8:
Table 8. PCA SFRs 4289A-8051-09/03
Page 9 and 10:
Table 13. SFR Mapping F8h F0h E8h E
Page 11 and 12:
11 AT89C51ID2 4289A-8051-09/03 50 4
Page 13 and 14:
Table 14. Pin Description (Continue
Page 15 and 16:
Oscillators 4289A-8051-09/03 AT89C5
Page 17 and 18:
4289A-8051-09/03 Table 18. PCON Reg
Page 19 and 20:
4289A-8051-09/03 AT89C51ID2 It is a
Page 21 and 22:
4289A-8051-09/03 - FCLK CPU and FCL
Page 23 and 24:
Figure 5. Mode Switching Waveforms
Page 25 and 26:
4289A-8051-09/03 Table 21. CKCON1 R
Page 27 and 28:
4289A-8051-09/03 Table 22. AUXR1 re
Page 29 and 30:
Expanded RAM (XRAM) Figure 7. Inter
Page 31 and 32:
Registers Table 23. AUXR Register A
Page 33 and 34:
Reset Output 4289A-8051-09/03 AT89C
Page 35 and 36:
Figure 12. Power Fail Detect Vcc 42
Page 37 and 38:
Programmable Clock- Output 4289A-80
Page 39 and 40:
Registers Table 24. T2CON Register
Page 41 and 42:
Programmable Counter Array PCA 4289
Page 43 and 44:
4289A-8051-09/03 Table 26. CMOD Reg
Page 45 and 46:
Figure 16. PCA Interrupt System 428
Page 47 and 48:
4289A-8051-09/03 Table 29. PCA Modu
Page 49 and 50:
4289A-8051-09/03 AT89C51ID2 PCA Cap
Page 51 and 52:
Figure 19. PCA High Speed Output Mo
Page 53 and 54:
4289A-8051-09/03 AT89C51ID2 Serial
Page 55 and 56:
4289A-8051-09/03 AT89C51ID2 The SAD
Page 57 and 58:
Internal Baud Rate Generator (BRG)
Page 59 and 60:
UART Registers Table 40. SADEN Regi
Page 61 and 62:
4289A-8051-09/03 Table 44. T2CON Re
Page 63 and 64:
4289A-8051-09/03 Table 46. BDRCON R
Page 65 and 66:
4289A-8051-09/03 AT89C51ID2 Registe
Page 67 and 68:
4289A-8051-09/03 Table 49. IPL0 Reg
Page 69 and 70:
4289A-8051-09/03 Table 51. IEN1 Reg
Page 71 and 72:
4289A-8051-09/03 Table 54. IPH1 Reg
Page 73 and 74:
Power Management 4289A-8051-09/03 A
Page 75 and 76:
4289A-8051-09/03 AT89C51ID2 pins, t
Page 77 and 78: AT89C51ID2 Keyboard Interface The A
Page 79 and 80: 4289A-8051-09/03 Table 59. KBE Regi
Page 81 and 82: 4289A-8051-09/03 AT89C51ID2 2-wire
Page 83 and 84: 4289A-8051-09/03 AT89C51ID2 Descrip
Page 85 and 86: 4289A-8051-09/03 AT89C51ID2 When th
Page 87 and 88: Figure 33. Format and State in the
Page 93 and 94: Table 67. Status in Slave Receiver
Page 95 and 96: Table 68. Status in Slave Transmitt
Page 97 and 98: 4289A-8051-09/03 Bit Number 1 SD1 A
Page 99 and 100: Serial Port Interface (SPI) 4289A-8
Page 101 and 102: Functional Description Figure 38 sh
Page 103 and 104: Figure 40. Data Transmission Format
Page 105 and 106: 4289A-8051-09/03 Figure 43. SPI Int
Page 107 and 108: Serial Peripheral DATa register (SP
Page 109 and 110: WDT During Power Down and Idle 4289
Page 111 and 112: 4289A-8051-09/03 AT89C51ID2 Power-o
Page 113 and 114: 4289A-8051-09/03 Figure 44. Recomme
Page 115 and 116: Registers Table 85. EECON Register
Page 117 and 118: 4289A-8051-09/03 AT89C51ID2 Flash M
Page 119 and 120: 4289A-8051-09/03 Table 88. Program
Page 121 and 122: 4289A-8051-09/03 Table 92. Program
Page 123 and 124: Functional Description Figure 48. B
Page 125 and 126: Boot Process Figure 49. Bootloader
Page 127: Functional Description 4289A-8051-0
Page 131 and 132: Write / Program Commands This flow
Page 133 and 134: Display Data Description Figure 55.
Page 135 and 136: Example 4289A-8051-09/03 Read funct
Page 137 and 138: 4289A-8051-09/03 Table 95. ISP Comm
Page 139 and 140: Table 96. API Call Summary (Continu
Page 141 and 142: T A = -40°C to +85°C; V SS = 0V;
Page 143 and 144: External Program Memory Characteris
Page 145 and 146: External Program Memory Read Cycle
Page 147 and 148: External Data Memory Write Cycle 42
Page 149 and 150: AC Testing Input/Output Waveforms F
Page 151 and 152: Ordering Information 4289A-8051-09/
Page 153 and 154: VQFP44 4289A-8051-09/03 AT89C51ID2
Page 155 and 156: PLCC68 4289A-8051-09/03 AT89C51ID2
Page 157 and 158: 4289A-8051-09/03 AT89C51ID2 Pulse W
Page 159: Atmel Corporation Atmel Operations
show all

Atmel AT89C51ID2 Data Sheet - Keil

Create successful ePaper yourself

Delete template?

Save as template?