mc9rs08ka2 Freescale Semiconductor, Inc, mc9rs08ka2 Datasheet - Page 53

• Manufacturer Part Number: mc9rs08ka2
• Description: Rs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

7.3
The KBI includes three registers:
Refer to the direct-page register summary in
for all KBI registers. This section refers to registers and control bits only by their names.
The KBI registers are summarized in
7.3.1
KBISC contains the status flag and control bits, which are used to configure the KBI.
Freescale Semiconductor
KBACK
Field
KBF
•
•
•
3
2
An 8-bit pin status and control register
An 8-bit pin enable register
An 8-bit edge select register
Reset:
Register Definition
KBISC
KBIPE
KBIES
Keyboard Interrupt Flag — KBF indicates that a keyboard interrupt is detected. Writes have no effect on KBF.
0 No keyboard interrupt detected.
1 Keyboard interrupt detected.
Keyboard Acknowledge — Writing a 1 to KBACK is part of the flag-clearing mechanism. KBACK always reads
as 0.
KBI Status and Control Register (KBISC)
W
R
Name
0
0
7
= Unimplemented
Figure 7-3. KBI Status and Control Register (KBISC)
W
W
W
R
R
R
0
0
6
Table 7-3. KBISC Register Field Descriptions
MC9RS08KA2 Series Data Sheet, Rev. 3
Table 7-2. KBI Register Summary
0
0
0
7
Table
5
0
0
7-2.
Chapter 4,
0
0
0
6
KBEDG5 KBEDG4
0
0
4
KBIPE5
Description
0
5
“Memory,” for the absolute address assignments
KBIPE4
KBF
0
3
4
0
KBACK
Chapter 7 Keyboard Interrupt (RS08KBIV1)
KBF
0
0
3
0
0
2
KBEDG2 KBEDG1 KBEDG0
KBIPE2
KBACK
0
2
KBIE
0
1
KBIPE1
KBIE
1
KBMOD
0
0
KBMOD
KBIPE0
0
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