AT83SND1CXXX-ROTIL datasheet(179/212 Pages) ATMEL

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179

4109J–8051–10/06

AT8xC51SND1C

KBCON (S:A3h) – Keyboard Control Register

Reset Value = 0000 1111b

21.2.0.1

Table 142. KBSTA Register

KBSTA (S:A4h) – Keyboard Control and Status Register

Reset Value = 0000 0000b

7654

3210

KINL3

KINL2

KINL1

KINL0

KINM3

KINM2

KINM1

KINM0

Bit

Number

Bit

Mnemonic

Description

7 - 4

KINL3:0

Keyboard Input Level Bit

Set to enable a high level detection on the respective KIN3:0 input.

Clear to enable a low level detection on the respective KIN3:0 input.

3 - 0

KINM3:0

Keyboard Input Mask Bit

Set to prevent the respective KINF3:0 flag from generating a keyboard interrupt.

Clear to allow the respective KINF3:0 flag to generate a keyboard interrupt.

7654

3210

KPDE

KINF3

KINF2

KINF1

KINF0

Bit

Number

Bit

Mnemonic

Description

7KPDE

Keyboard Power Down Enable Bit

Set to enable exit of power down mode by the keyboard interrupt.

Clear to disable exit of power down mode by the keyboard interrupt.

6 - 4

Reserved

The value read from these bits is always 0. Do not set these bits.

3 - 0

KINF3:0

Keyboard Input Interrupt Flag

Set by hardware when the respective KIN3:0 input detects a programmed level.

Cleared when reading KBSTA.

AT83SND1CXXX-ROTIL 데이터시트(PDF) 179 Page - ATMEL Corporation

AT83SND1CXXX-ROTIL 데이터시트(HTML) 179 Page - ATMEL Corporation

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