Rainbow Electronics AT89C5122 - Manual (Page 157)

157
AT8xC5122/23
4202E–SCR–06/06
Reset Value = 0000 0000b
Table 95. Keyboard Input Enable Register - KBE (9Dh)
7 6 5 4 3 2 1 0
KBE7 KBE6 KBE5 KBE4 KBE3 KBE2 KBE1 KBE0
Bit
Number
Bit
Mnemonic Description
7 KBE7
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.
6 KBE6
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.
5 KBE5
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.
4 KBE4
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.
3 KBE3
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.
2 KBE2
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.
1 KBE1
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.
0 KBE0
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.