AT89C51RC2-RLTIL Atmel, AT89C51RC2-RLTIL Datasheet - Page 60

• Manufacturer Part Number: AT89C51RC2-RLTIL
• Description: 8-bit Microcontrollers - MCU 80C31 w/4k
• Manufacturer: Atmel

Specifications of AT89C51RC2-RLTIL

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 60 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 1280 B
• On-chip Adc: No
• Operating Supply Voltage: 2.7 V to 5.5 V
• Package / Case: VQFP-44
• Mounting Style: SMD/SMT
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Program Memory Type: Flash
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

60
AT89C51RB2/RC2
Table 47. IEN1 Register
IEN1 - Interrupt Enable Register (B1h)
Reset Value = XXXX X000b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
ESPI
KBD
Bit
6
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
SPI Interrupt Enable Bit
Cleared to disable SPI interrupt.
Set to enable SPI interrupt.
Reserved
Keyboard Interrupt Enable Bit
Cleared to disable keyboard interrupt.
Set to enable keyboard interrupt.
5
-
4
-
3
-
ESPI
2
1
-
4180E–8051–10/06
KBD
0