AT89C51RB2-3CSIM datasheet(67/127 Pages) ATMEL

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AT89C51RB2/RC2

4180C–8051–12/03

Table 53. KBLS Register

KBLS - Keyboard Level Selector Register (9Ch)

Reset Value = 0000 0000b

KBLS7

KBLS6

KBLS5

KBLS4

KBLS3

KBLS2

KBLS1

KBLS0

Bit

Number

Bit

Mnemonic

Description

7KBLS7

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.

6KBLS6

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.

5KBLS5

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.

4KBLS4

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.

3KBLS3

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.

2KBLS2

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.

1KBLS1

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.

0KBLS0

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.

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