AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 116

• 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

116
AT89C51AC3
Table 66. IEN1 Register
IEN1 (S:E8h)
Interrupt Enable Register
Reset Value = xxxx 0x0xb
bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
EADC
ESPI
Bit
6
-
-
-
-
-
-
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
SPI Interrupt Enable bit
Clear to disable the SPI interrupt.
Set to enable the SPI interrupt.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
ADC Interrupt Enable bit
Clear to disable the ADC interrupt.
Set to enable the ADC interrupt.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
-
4
-
ESPI
3
2
-
4383D–8051–02/08
EADC
1
0
-