AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 111

• 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

4383D–8051–02/08
Table 60. ADCLK Register
ADCLK (S:F2h)
ADC Clock Prescaler
Reset Value = XXX0 0000b
Note:
Table 61. ADDH Register
ADDH (S:F5h Read Only)
ADC Data High Byte Register
Reset Value = 00h
Table 62. ADDL Register
ADDL (S:F4h Read Only)
ADC Data Low Byte Register
Number
Number
ADAT 9
Bit
Bit
7-5
4-0
7-0
7
7
7
-
-
1. In X1 mode:
For PRS > 0 F
For PRS = 0 F
In X2 mode:
For PRS > 0 F
For PRS = 0 F
Mnemonic Description
Mnemonic Description
ADAT 8
ADAT9:2
PRS4:0
Bit
Bit
6
6
6
-
-
-
Reserved
The value read from these bits are indeterminate. Do not set these bits.
Clock Prescaler
See Note
ADC result
bits 9-2
ADAT 7
ADC
ADC
ADC
ADC
5
5
5
-
-
= FXTAL
= FXTAL
= FXTAL
= FXTAL
4xPRS
128
2xPRS
64
(1)
ADAT 6
PRS 4
4
4
4
-
ADAT 5
PRS 3
3
3
3
-
ADAT 4
PRS 2
2
2
2
-
ADAT 3
ADAT 1
PRS 1
1
1
1
ADAT 2
ADAT 0
PRS 0
0
0
0
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