AT89C51AC2 Atmel Corporation, AT89C51AC2 Datasheet - Page 23

• 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

Program
Configuration
Information
4231D–CAN–03/08
•
•
Note:
•
•
Note:
Instruction: LCALL FFF0h.
At the complete API execution by the bootloader, the value to read is in the api_value
variable.
Parameter Settings
Instruction: LCALL FFF0h.
__api_rd_bootloader_vers
__api_rd_device_id3
No special resources are used by the bootloader during this operation
1. See in the A/T89C51AC2 datasheet the time that a write operation takes.
2. No special resources are used by the bootloader during these operations
__api_wr_SSB_LEVEL0
__api_wr_SSB_LEVEL1
__api_wr_SSB_LEVEL2
API_name
__api_set_BLJB
__api_clr_BLJB
__api_wr_BSB
__api_wr_SBV
__api_set_X2
__api_wr_EB
__api_clr_X2
ion
API Name
A/T89C51AC2 UART Bootloader
0Fh
00h
R1
0Ah
0Ah
0Ah
0Ah
R1
06h
06h
06h
05h
05h
05h
DPTR0
0003h
0000h
DPTR0
0008h
0008h
0004h
0004h
0000h
0001h
0006h
FFh
FEh
FCh
DPTR1
DPTR1
x
x
x
x
x
x
x
x
x
x
x
x
return value
value to write
value to write
value to write
return id3
Acc
Acc
00h
01h
00h
01h
x
x
x
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