MC68HC908LJ24 Datasheet, PDF (429/464 Pages) Motorola, Inc – Microcontrollers

Break Module (BRK)
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 23-1. 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
SIM Break Flag Control ^Read: _BCFE
R
R
R
R
R
R
R
$FE03
Register Write:
(SBFCR) _{Reset: 0}
$FE0C
Break Address ^Read: _{Bit 15}
14
13
12
11
10
Register High Write:
9
Bit 8
(BRKH) _{Reset: 0}
0
0
0
0
0
0
0
$FE0D
Break Address ^Read: _{Bit 7}
6
5
4
3
2
1
Bit 0
Register Low Write:
(BRKL) _{Reset: 0}
0
0
0
0
0
0
0
Break Status and Control ^Read: _BRKE
BRKA
0
0
0
0
0
0
$FE0E
Register Write:
(BRKSCR) _{Reset: 0}
0
0
0
0
0
0
0
Note: Writing a logic 0 clears SBSW.
= Unimplemented
R = Reserved
Figure 23-2. Break Module I/O Register Summary
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Break Module (BRK)
Data Sheet
429