SC9RS08KA2J3CSC datasheet(54/134 Pages) FREESCALE

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Chapter 7 Keyboard Interrupt (RS08KBIV1)

SC9RS08KA2 Series Data Sheet, Rev. 1

Freescale Semiconductor

7.3.2

KBI Pin Enable Register (KBIPE)

KBIPE contains the pin enable control bits.

7.3.3

KBI Edge Select Register (KBIES)

KBIES contains the edge select control bits.

KBIE

Keyboard Interrupt Enable — KBIE enables keyboard interrupt requests.

0 Keyboard interrupt request not enabled.

1 Keyboard interrupt request enabled.

KBMOD

Keyboard Detection Mode — KBMOD (along with the KBEDG bits) controls the detection mode of the keyboard

interrupt pins.

0 Keyboard detects edges only.

1 Keyboard detects both edges and levels.

765

210

KBIPE5

KBIPE4

KBIPE2

KBIPE1

KBIPE0

Reset:

000

Figure 7-4. KBI Pin Enable Register (KBIPE)

Table 7-4. KBIPE Register Field Descriptions

Field

Description

5,4, 2:0

KBIPEn

Keyboard Pin Enables — Each of the KBIPEn bits enables the corresponding keyboard interrupt pin.

0 Corresponding pin not enabled as keyboard interrupt.

1 Corresponding pin enabled as keyboard interrupt.

765

210

KBEDG5

KBEDG4

KBEDG2

KBEDG1

KBEDG0

Reset:

000

Figure 7-5. KBI Edge Select Register (KBIES)

Table 7-5. KBIES Register Field Descriptions

Field

Description

5,4, 2:0

KBEDGn

Keyboard Edge Selects — Each of the KBEDGn bits selects the falling edge/low level or rising edge/high level

function of the corresponding pin.

0 Falling edge/low level.

1 Rising edge/high level.

Table 7-3. KBISC Register Field Descriptions (continued)

Field

Description

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