AT89C51AC2 Atmel Corporation, AT89C51AC2 Datasheet - Page 14

• 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

Flow Description: Read Command
Example
14
A/T89C51AC2 UART Bootloader
COMMAND FINISHED
Wait Display Data
All Data Read
Send Display Command
OR
Host
OR
COMMAND ABORTED
Wait Checksum Error
COMMAND ABORTED
Wait Security Error
Display data from address 0000h to 0020h
BOOTLOADER
BOOTLOADER
BOOTLOADER
HOST
BOOTLOADER
Display Command
’X’ & CR & LF
’L’ & CR & LF
’Address = ’
’Reading value’
CR & LF
0000=-----data------ CR LF
0010=-----data------ CR LF
0020=data CR LF
: 05 0000 04 0000 0020 00 D7
: 05 0000 04 0000 0020 00 D7
Send Checksum Error
Send Security Error
Complete Frame
Bootloader
Wait Display Command
(16 data)
(16 data)
( 1 data)
COMMAND FINISHED
RD_WR_SECURITY
Send Display Data
Checksum Error
All Data Read
All Data Read
Read Data
4231D–CAN–03/08