AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 104

• Manufacturer Part Number: AT89C51AC3
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC3

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

104
AT89C51AC3
Table 55. CH Register
CH (S:F9h)
PCA Counter Register High Value
Reset Value = 0000 00000b
Table 56. CL Register
CL (S:E9h)
PCA counter Register Low Value
Reset Value = 0000 00000b
Number
Number
CH 7
CL 7
Bit
Bit
7:0
7:0
7
7
Mnemonic Description
Mnemonic Description
CL0 7:0
CH 7:0
CH 6
CL 6
Bit
Bit
6
6
High byte of Timer/Counter
Low byte of Timer/Counter
CH 5
CL 5
5
5
CH 4
CL 4
4
4
CH 3
CL 3
3
3
CH 2
CL 2
2
2
4383D–8051–02/08
CH 1
CL 1
1
1
CH 0
CL 0
0
0