MC908JB16DWE Datasheet, PDF (309/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

Break Module (BRK)
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
6
5
4
3
2
1
Bit 0
Read:
SBSW
$FE00
SIM
Break
Status
Register
(SBSR)
Write:
R
R
R
R
R
R
R
Note
Reset:
0
Read:
$FE03
SIM Break Flag Control
Register (SBFCR)
Write:
BCFE
R
R
R
R
R
R
R
Reset: 0
Read:
$FE0C
Break Address Register
High (BRKH)
Write:
Bit 15
14
13
12
11
10
9
Bit 8
Reset: 0
0
0
0
0
0
0
0
Read:
$FE0D
Break Address Register
Low (BRKL)
Write:
Bit 7
6
5
4
3
2
1
Bit 0
Reset: 0
0
0
0
0
0
0
0
Read:
0
0
0
0
0
0
$FE0E
Break Status and Control
Register (BRKSCR)
Write:
BRKE
BRKA
Reset: 0
0
0
0
0
0
0
0
Note: Writing a logic 0 clears SBSW.
= Unimplemented
R = Reserved
Figure 19-2. Break Module I/O Register Summary
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor
Break Module (BRK)
Technical Data
309