MC68HC08JB1 Datasheet, PDF (189/216 Pages) Motorola, Inc – Microcontrollers

INTERNAL BUS
KBA0
.
KBIE0
.
TO PULLUP ENABLE
.
KBA7
KBIE7
TO PULLUP ENABLE
V_REG
D ^CLR Q
CK
ACKK
RESET
KEYBOARD
INTERRUPT FF
VECTOR FETCH
DECODER
KEYF
SYNCHRONIZER
Keyboard
Interrupt
Request
IMASKK
MODEK
Figure 13-1. Keyboard Module Block Diagram
Table 13-2. I/O Register Summary
Addr.
Register Name
Bit 7
Keyboard Status and Control ^{Read: 0}
$0016
Register Write:
(KBSCR) _{Reset: 0}
$0017
Keyboard Interrupt Enable ^Read:
Register Write:
(KBIER) _Reset:
KBIE7
0
6
5
0
0
0
0
KBIE6 KBIE5
0
0
= Unimplemented
4
0
0
KBIE4
0
3
KEYF
0
KBIE3
0
2
0
ACKK
0
1
Bit 0
IMASKK MODEK
0
0
KBIE2 KBIE1 KBIE0
0
0
0
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor
Technical Data
189