MC68HC908KX8 Datasheet, PDF (271/310 Pages) Motorola, Inc – Microcontrollers

Break (BRK) Module
Functional Description
IAB15–IAB8
IAB15–IAB0
BREAK ADDRESS REGISTER HIGH
8-BIT COMPARATOR
8-BIT COMPARATOR
BREAK ADDRESS REGISTER LOW
CONTROL
BREAK
IAB7–IAB0
Figure 19-1. Break Module Block Diagram
Addr.
Register Name
Bit 7
SIM Break Status Register ^{Read: 0}
$FE00
(SBSR) Write: R
See page 275. _{Reset: 0}
$FE03
SIM Break Flag Control ^Read:
Register (SBFCR) Write:
See page 276. _Reset:
BCFE
0
$FE09
Break Address Register ^Read:
High (BRKH) Write:
See page 274. _Reset:
Bit 15
0
Break Address Register ^Read: _{Bit 7}
$FE0A
Low (BRKL) Write:
See page 274. _{Reset: 0}
$FE0B
Break Status and Control ^Read:
Register (BRKSCR) Write:
See page 273. _Reset:
BRKE
0
Break Auxiliary Register ^{Read: 0}
$FE02
(BRKAR) Write:
See page 277. _{Reset: 0}
Note: Writing a logic 0 clears BW.
6
5
0
0
R
R
0
0
R
R
14
13
0
0
6
5
0
0
0
BRKA
0
0
0
0
0
0
= Unimplemented
4
3
2
1
0
0
R
R
R
1
0
0
R
R
R
12
11
10
0
0
0
4
3
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R = Reserved
Figure 19-2. I/O Register Summary
1
Bit 0
BW
0
NOTE
R
0
0
R
R
9
Bit 8
0
0
1
Bit 0
0
0
0
0
0
0
0
BDCOP
0
0
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
Break (BRK) Module
Technical Data
271