MC68HC908GR4MP datasheet(125/286 Pages) FREESCALE

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I/O Registers

MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7

Freescale Semiconductor

125

MODEK — Keyboard Triggering Sensitivity Bit

This read/write bit controls the triggering sensitivity of the keyboard interrupt pins. Reset clears

MODEK.

1 = Keyboard interrupt requests on falling edges and low levels

0 = Keyboard interrupt requests on falling edges only

13.7.2 Keyboard Interrupt Enable Register

The keyboard interrupt enable register enables or disables each port A pin to operate as a keyboard

interrupt pin.

KBIE3–KBIE0 — Keyboard Interrupt Enable Bits

Each of these read/write bits enables the corresponding keyboard interrupt pin to latch interrupt

requests. Reset clears the keyboard interrupt enable register.

1 = PTAx pin enabled as keyboard interrupt pin

0 = PTAx pin not enabled as keyboard interrupt pin

Address: $001B

Bit 7

654321

Bit 0

Read:

0000

KBIE3

KBIE2

KBIE1

KBIE0

Write:

Reset:

0000

= Unimplemented

Figure 13-4. Keyboard Interrupt Enable Register (INTKBIER)

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