Motorola MC68HC908AB32 - Break Module Block Diagram

Break Module (BRK)
Functional Description
MC68HC908AB32
—
Rev. 1.0 Technical Data
MOTOROLA Break Module (BRK)
367
Figure 22-1. Break Module Block Diagram
IAB15–IAB8
IAB7–IAB0
8-BIT COMPARATOR
8-BIT COMPARATOR
CONTROL
BREAK ADDRESS REGISTER LOW
BREAK ADDRESS REGISTER HIGH
IAB15–IAB0
BREAK
Addr. Register Name Bit 7 654321Bit 0
$FE00
SIM Break Status Register
(SBSR)
Read:
RRRRRR
SBSW
R
Write: Note
Reset: 00000000
$FE03
SIM Break Flag Control
Register (SBFCR)
Read:
BCFE RRRRRRR
Write:
Reset: 0
$FE0C
Break Address Register
High (BRKH)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset: 00000000
$FE0D
Break Address Register
Low (BRKL)
Read:
Bit 7 654321Bit 0
Write:
Reset: 00000000
$FE0E
Break Status and Control
Register (BRKSCR)
Read:
BRKE BRKA
000000
Write:
Reset: 00000000
Note: Writing a logic 0 clears SBSW.
= Unimplemented R = Reserved
Figure 22-2. Break Module I/O Register Summary