AT89C51AC2 Atmel Corporation, AT89C51AC2 Datasheet - Page 26

• Manufacturer Part Number: AT89C51AC2
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC2

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 40 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 1.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Appendix-B
Table 4. API Summary
26
Function Name
__api_rd_code_byte
__api_wr_code_byte
__api_wr_code_page
__api_erase_block0
__api_erase_block1
__api_erase_block2
__api_rd_HSB
__api_set_X2
__api_clr_X2
__api_set_BLJB
__api_clr_BLJB
__api_rd_BSB
__api_wr_BSB
__api_rd_SBV
__api_wr_SBV
__api_erase_SBV
__api_rd_SSB
__api_wr_SSB_level0
__api_wr_SSB_level1
__api_wr_SSB_level2
__api_rd_EB
__api_wr_EB
__api_rd_manufacturer
__api_rd_device_id1
__api_rd_device_id2
__api_rd_device_id3
__api_rd_bootloader_version
__api_eeprom_busy
__api_rd_eeprom_byte
__api_wr_eeprom_byte
__api_start_bootloader
A/T89C51AC2 UART Bootloader
Bootloader
Execution
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
no
no
no
no
R1
02h
09h
01h
01h
01h
0Bh
0Ah
0Ah
0Ah
0Ah
07h
06h
07h
06h
06h
07h
05h
05h
05h
07h
06h
00h
00h
00h
00h
0Fh
Address of the
program in the
Flash memory
Flash memory
first Byte to
Address in
DPTR0
to write
00FFh
00FEh
00FCh
0000h
2000h
4000h
0000h
0008h
0008h
0004h
0004h
0001h
0000h
0002h
0001h
0001h
0000h
0006h
0006h
0000h
0001h
0002h
0003h
0000h
XRAM of the
first data to
Address in
DPTR1
program
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
-
Number of Byte to
Value to write
4231D–CAN–03/08
return value
return value
return value
return value
return value
return value
return value
return value
return value
return value
program
value
value
value
Acc
FCh
00h
01h
00h
01h
x
x
x
x
x
x