MC68HC908JB8 Datasheet, PDF (247/286 Pages) Motorola, Inc – MICROCONTROLLERS

Break Module (BREAK)
Functional Description
IAB[15:8]
IAB[15:0]
BREAK ADDRESS REGISTER HIGH
8-BIT COMPARATOR
8-BIT COMPARATOR
BREAK ADDRESS REGISTER LOW
CONTROL
BKPT
(TO SIM)
IAB[7:0]
Figure 17-1. Break Module Block Diagram
Addr.
Register Name
Bit 7
6
5
4
$FE00 Break Status Register Read:
(BSR) _Write: ^R
R
R
R
Reset:
$FE03
Break Flag Control Read:
Register
(BFCR)
Write:
BCFE
R
R
R
Reset: 0
$FE0C
Break Address High Read:
Register
(BRKH)
Write:
Bit15
Bit14
Bit13
Bit12
Reset: 0
0
0
0
$FE0D
Break Address low Read:
Register
(BRKL)
Write:
Bit7
Bit6
Bit5
Bit4
Reset: 0
0
0
0
$FE0E Break Status and Control Read:
0
0
Register
(BRKSCR)
Write:
BRKE
BRKA
Reset: 0
0
0
0
Note: Writing a logic 0 clears
SBSW.
= Unimplemented
R
3
2
1
Bit 0
SBSW
R
R
R
See note
0
R
R
R
R
Bit11 Bit10
Bit9
Bit8
0
0
0
0
Bit3
Bit2
Bit1
Bit0
0
0
0
0
0
0
0
0
0
0
0
0
= Reserved
Figure 17-2. Break I/O Register Summary
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
Break Module (BREAK)
Technical Data
247