AT83C51RB2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT83C51RB2-3CSCM

80C51 High Performance ROM 8-bit Microcontroller

Atmel Corporation 

Table 42. KBLS Register

KBLS - Keyboard Level Selector Register (9Ch)

7

6

5

4

3

KBLS7

KBLS6

KBLS5

KBLS4

KBLS3

2

KBLS2

1

KBLS1

Bit

Number

7

6

5

4

3

2

1

0

Bit

Mnemonic Description

KBLS7

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.

KBLS6

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.

KBLS5

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.

KBLS4

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.

KBLS3

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.

KBLS2

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.

KBLS1

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.

KBLS0

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.

Reset Value = 0000 0000b

0

KBLS0

58 AT80C51RD2/AT83C51Rx2

4113B–8051–03/05

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