at89c51rc2-slsil ATMEL Corporation, at89c51rc2-slsil Datasheet - Page 67

• Manufacturer Part Number: at89c51rc2-slsil
• Description: 8-bit Microcontroller With 16k/ 32k Bytes Flash
• Manufacturer: ATMEL Corporation

4180E–8051–10/06
Table 53. KBLS Register
KBLS - Keyboard Level Selector Register (9Ch)
Reset Value = 0000 0000b
Number
KBLS7
Bit
7
7
6
5
4
3
2
1
0
Mnemonic Description
KBLS6
KBLS7
KBLS6
KBLS5
KBLS4
KBLS3
KBLS2
KBLS1
KBLS0
Bit
6
Keyboard Line 7 Level Selection Bit
Cleared to enable a low level detection on Port line 7.
Set to enable a high level detection on Port line 7.
Keyboard Line 6 Level Selection Bit
Cleared to enable a low level detection on Port line 6.
Set to enable a high level detection on Port line 6.
Keyboard Line 5 Level Selection Bit
Cleared to enable a low level detection on Port line 5.
Set to enable a high level detection on Port line 5.
Keyboard Line 4 Level Selection Bit
Cleared to enable a low level detection on Port line 4.
Set to enable a high level detection on Port line 4.
Keyboard Line 3 Level Selection Bit
Cleared to enable a low level detection on Port line 3.
Set to enable a high level detection on Port line 3.
Keyboard Line 2 Level Selection Bit
Cleared to enable a low level detection on Port line 2.
Set to enable a high level detection on Port line 2.
Keyboard Line 1 Level Selection Bit
Cleared to enable a low level detection on Port line 1.
Set to enable a high level detection on Port line 1.
Keyboard Line 0 Level Selection Bit
Cleared to enable a low level detection on Port line 0.
Set to enable a high level detection on Port line 0.
KBLS5
5
KBLS4
4
KBLS3
3
AT89C51RB2/RC2
KBLS2
2
KBLS1
1
KBLS0
0
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