AT89C51RC2-SLRIM Atmel, AT89C51RC2-SLRIM Datasheet - Page 65

• Manufacturer Part Number: AT89C51RC2-SLRIM
• Description: IC MCU FLASH 8051 32K 5V 44-PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RC2-SLRIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C51RC2SLRIMTR

Registers
4180E–8051–10/06
Table 51. KBF Register
KBF - Keyboard Flag Register (9Eh)
Reset Value = 0000 0000b
This register is read only access, all flags are automatically cleared by reading the
register.
Number
KBF7
Bit
7
7
6
5
4
3
2
1
0
Mnemonic Description
KBF6
KBF7
KBF6
KBF5
KBF4
KBF3
KBF2
KBF1
KBF0
Bit
6
Keyboard Line 7 Flag
Set by hardware when the Port line 7 detects a programmed level. It generates a
Keyboard interrupt request if the KBKBIE. 7 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 6 Flag
Set by hardware when the Port line 6 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 6 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 5 Flag
Set by hardware when the Port line 5 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 5 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 4 Flag
Set by hardware when the Port line 4 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 4 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 3 Flag
Set by hardware when the Port line 3 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 3 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 2 Flag
Set by hardware when the Port line 2 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 2 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 1 Flag
Set by hardware when the Port line 1 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 1 bit in KBIE register is set.
Must be cleared by software.
Keyboard Line 0 Flag
Set by hardware when the Port line 0 detects a programmed level. It generates a
Keyboard interrupt request if the KBIE. 0 bit in KBIE register is set.
Must be cleared by software.
KBF5
5
KBF4
4
KBF3
3
AT89C51RB2/RC2
KBF2
2
KBF1
1
KBF0
0
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