mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 203

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 18
Break Module (BRK)
18.1 Introduction
This section describes the break module. The break module can generate a break interrupt that stops
normal program flow at a defined address to enter a background program.
18.2 Features
Features of the break module include:
Freescale Semiconductor
Note: Writing a logic 0 clears BW.
$FE0C
$FE0D
$FE00
$FE03
$FE0E
Addr.
•
•
•
•
Accessible input/output (I/O) registers during the break interrupt
CPU-generated break interrupts
Software-generated break interrupts
COP disabling during break interrupts
SIM Break Status Register
Break Status and Control
SIM Break Flag Control
Register Name
Break Address
Break Address
Register High
Register Low
(BRKSCR)
(SBFCR)
Register
Register
(BRKH)
(SBSR)
(BRKL)
Figure 18-1. Break Module I/O Register Summary
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
BRKE
BCFE
Bit 15
Bit 7
Bit 7
MC68HC908JW32 Data Sheet, Rev. 5
R
0
0
0
0
= Unimplemented
BRKA
14
R
R
6
0
6
0
0
13
R
R
5
0
5
0
0
0
12
R
R
R
4
0
4
0
0
0
= Reserved
11
R
R
3
0
3
0
0
0
10
R
R
2
0
2
0
0
0
SBSW
Note
R
1
0
9
0
1
0
0
0
Bit 0
Bit 8
Bit 0
R
R
0
0
0
0
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