MC68908GZ8MFJE Datasheet, PDF (272/314 Pages) Freescale Semiconductor, Inc – Microcontrollers

Development Support
ADDRESS BUS[15:8]
ADDRESS BUS[15:0]
BREAK ADDRESS REGISTER HIGH
8-BIT COMPARATOR
8-BIT COMPARATOR
BREAK ADDRESS REGISTER LOW
CONTROL
BKPT
(TO SIM)
ADDRESS BUS[7:0]
Figure 20-1. Break Module Block Diagram
Addr.
Register Name
$FE00
Read:
Break Status Register
(BSR) Write:
See page 275. _Reset:
Read:
$FE02
Reserved Write:
Reset:
$FE03
Break Flag Control ^Read:
Register (BFCR) Write:
See page 275.
Reset:
$FE09
Read:
Break Address High
Register (BRKH) Write:
See page 274. _Reset:
$FE0A
Break Address Low ^Read:
Register (BRKL) Write:
See page 274. _Reset:
$FE0B
Break Status and Control ^Read:
Register (BRKSCR) Write:
See page 274.
Reset:
1. Writing a logic 0 clears SBSW.
Bit 7
R
R
0
BCFE
0
Bit15
0
Bit 7
0
BRKE
0
6
5
R
R
R
R
0
0
R
R
Bit14
Bit13
0
0
Bit 6
Bit 5
0
0
0
BRKA
0
0
= Unimplemented
4
3
2
1
Bit 0
SBSW
R
R
R
R
Note⁽¹⁾
0
R
R
R
R
R
0
0
0
0
0
R
R
R
R
R
Bit12
Bit11
Bit10
Bit9
Bit8
0
0
0
0
0
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R = Reserved
Figure 20-2. Break I/O Register Summary
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
272
Freescale Semiconductor