AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 64

• Manufacturer Part Number: AT89C51RB2-RLTCM
• Description: 8-bit Microcontroller with 16K/ 32K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

64
AT89C51RB2/RC2
Table 52. KBE Register
KBE - Keyboard Input Enable Register (9Dh)
Reset Value = 0000 0000b
Number
KBE7
Bit
7
7
6
5
4
3
2
1
0
Mnemonic Description
KBE6
KBE7
KBE6
KBE5
KBE4
KBE3
KBE2
KBE1
KBE0
Bit
6
Keyboard Line 7 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 7 bit in KBF register to generate an interrupt request.
Keyboard Line 6 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 6 bit in KBF register to generate an interrupt request.
Keyboard Line 5 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 5 bit in KBF register to generate an interrupt request.
Keyboard Line 4 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 4 bit in KBF register to generate an interrupt request.
Keyboard Line 3 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 3 bit in KBF register to generate an interrupt request.
Keyboard Line 2 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 2 bit in KBF register to generate an interrupt request.
Keyboard Line 1 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 1 bit in KBF register to generate an interrupt request.
Keyboard Line 0 Enable Bit
Cleared to enable standard I/O pin.
Set to enable KBF. 0 bit in KBF register to generate an interrupt request.
KBE5
5
KBE4
4
KBE3
3
KBE2
2
KBE1
1
4180B–8051–04/03
KBE0
0