MC9RS08KA2 Datasheet, PDF (54/132 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 7 Keyboard Interrupt (RS08KBIV1)
Table 7-3. KBISC Register Field Descriptions (continued)
Field
Description
1
KBIE
Keyboard Interrupt Enable — KBIE enables keyboard interrupt requests.
0 Keyboard interrupt request not enabled.
1 Keyboard interrupt request enabled.
0
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.
7.3.2 KBI Pin Enable Register (KBIPE)
KBIPE contains the pin enable control bits.
7
R
0
W
Reset:
0
6
5
4
3
2
0
0
KBIPE5 KBIPE4
KBIPE2
0
0
0
0
0
Figure 7-4. KBI Pin Enable Register (KBIPE)
1
KBIPE1
0
0
KBIPE0
0
Table 7-4. KBIPE Register Field Descriptions
Field
Description
5,4, 2:0 Keyboard Pin Enables — Each of the KBIPEn bits enables the corresponding keyboard interrupt pin.
KBIPEn 0 Corresponding pin not enabled as keyboard interrupt.
1 Corresponding pin enabled as keyboard interrupt.
7.3.3 KBI Edge Select Register (KBIES)
KBIES contains the edge select control bits.
7
R
0
W
Reset:
0
6
5
4
3
2
1
0
0
0
KBEDG5 KBEDG4
KBEDG2 KBEDG1 KBEDG0
0
0
0
0
0
0
0
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.
MC9RS08KA2 Series Data Sheet, Rev. 2
54
Freescale Semiconductor