MC68HC908JL3E Datasheet, PDF (191/226 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
$FE00
Read:
Break Status Register
(BSR)
Write:
Reset:
$FE03
Break Flag Control ^Read:
Register Write:
(BFCR) _Reset:
$FE0C
Break Address High ^Read:
Register Write:
(BRKH) _Reset:
$FE0D
Break Address low ^Read:
Register Write:
(BRKL) _Reset:
Break Status and Control ^Read:
$FE0E
Register Write:
(BRKSCR) _Reset:
Note: Writing a logic 0 clears SBSW.
Bit 7
R
BCFE
0
Bit15
0
Bit7
0
BRKE
0
6
5
R
R
R
R
Bit14 Bit13
0
0
Bit6
Bit5
0
0
0
BRKA
0
0
= Unimplemented
4
3
2
1
Bit 0
SBSW
R
R
R
R
See note
0
R
R
R
R
R
Bit12 Bit11 Bit10
Bit9
Bit8
0
0
0
0
0
Bit4
Bit3
Bit2
Bit1
Bit0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R = Reserved
Figure 17-2. Break I/O Register Summary
MC68H(R)C908JL3E/JK3E/JK1E — Rev. 2.0
MOTOROLA
Break Module (BREAK)
Technical Data
191