AT89C51RC2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C51RC2-3CSCM

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

AT89C51RB2/RC2

Table 53. KBLS Register

KBLS - Keyboard Level Selector Register (9Ch)

7

KBLS7

6

KBLS6

5

KBLS5

4

KBLS4

3

KBLS3

2

KBLS2

1

KBLS1

Bit

Bit

Number Mnemonic Description

Keyboard Line 7 Level Selection Bit

7

KBLS7 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

6

KBLS6 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

5

KBLS5 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

4

KBLS4 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

3

KBLS3 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

2

KBLS2 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

1

KBLS1 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

0

KBLS0 Cleared to enable a low level detection on Port line 0.

Set to enable a high level detection on Port line 0.

Reset Value = 0000 0000b

0

KBLS0

67

4180E–8051–10/06

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