AT89C51ID2-SMSIM ATMEL [ATMEL Corporation], AT89C51ID2-SMSIM Datasheet - Page 79

• Manufacturer Part Number: AT89C51ID2-SMSIM
• Description: 8-bit Flash Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

4289A–8051–09/03
Table 59. 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
AT89C51ID2
KBE1
1
KBE0
0
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