AT89C5132-ROTIL datasheet(153/181 Pages) ATMEL

tên linh kiện	AT89C5132-ROTIL

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153

4173D–USB–02/06

AT89C5132

KBCON (S:A3h) – Keyboard Control Register

Reset Value = 0000 1111b

22.2.0.1

Table 102. KBSTA Register

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

Reset Value = 0000 0000b

765

4321

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.

765

4321

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 values read from these Bits are 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.

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