Datasheet

Break Module (BREAK)
Functional Description
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
MOTOROLA Break Module (BREAK) 203
NON-DISCLOSURE AGREEMENT REQUIRED
Figure 17-1. Break Module Block Diagram
Addr.Register Name Bit 7654321Bit 0
$FE00
Break Status Register
(BSR)
See page 208.
Read:
RRRRRR
SBSW
R
Write: Note
(1)
Reset: 0
$FE02
Break Auxiliary Register
(BRKAR)
See page 207.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset:00000000
$FE03
Break Flag Control
Register (BFCR)
See page 209.
Read:
BCFERRRRRRR
Write:
Reset: 0
$FE09
Break Address High
Register (BRKH)
See page 206.
Read:
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8
Write:
Reset:00000000
$FE0A
Break Address Low
Register (BRKL)
See page 206.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset:00000000
$FE0B
Break Status and Control
Register (BRKSCR)
See page 205.
Read:
BRKE BRKA
000000
Write:
Reset:00000000
1. Writing a logic 0 clears SBSW.
= Unimplemented R = Reserved
Figure 17-2. Break I/O Register Summary
ADDRESS BUS[15:8]
ADDRESS BUS[7:0]
8-BIT COMPARATOR
8-BIT COMPARATOR
CONTROL
BREAK ADDRESS REGISTER LOW
BREAK ADDRESS REGISTER HIGH
ADDRESS BUS[15:0]
BKPT
(TO SIM)