MC68HC908GP20 Datasheet, PDF (101/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

IAB15–IAB8
IAB15–IAB0
BREAK ADDRESS REGISTER HIGH
8-BIT COMPARATOR
8-BIT COMPARATOR
BREAK ADDRESS REGISTER LOW
CONTROL
BREAK
IAB7–IAB0
Figure 6-1. Break Module Block Diagram
Addr. Register Name
Read:
$FE00
SIM
Break
Status
Register
(SBSR)
Write:
Reset:
$FE03
Read:
SIM Break Flag Control
Register (SBFCR)
Write:
Reset:
$FE09
Read:
Break Address Register
High (BRKH)
Write:
Reset:
$FE0A
Read:
Break Address Register
Low (BRKL)
Write:
Reset:
$FE0B
Read:
Break Status and Control
Register (BRKSCR)
Write:
Reset:
Note: Writing a logic 0 clears BW.
Bit 7
0
R
0
BCFE
0
Bit 15
0
Bit 7
0
BRKE
0
6
5
0
0
R
R
0
0
R
R
14
13
0
0
6
5
0
0
0
BRKA
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
R = Reserved
Figure 6-2. I/O Register Summary
1
BW
NOTE
0
R
Bit 0
0
R
0
R
9
Bit 8
0
0
1
Bit 0
0
0
0
0
0
0
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
101