Datasheet

System Integration Module (SIM)
Technical Data MC68HC908GR8 — Rev 4.0
274 System Integration Module (SIM) MOTOROLA
Addr.Register Name Bit 7654321Bit 0
$FE00
SIM Break Status Register
(SBSR)
Read:
RRRRRR
SBSW
R
Write: NOTE
Reset:00000000
Note: Writing a logic 0 clears SBSW.
$FE01
SIM Reset Status Register
(SRSR)
Read: POR PIN COP ILOP ILAD MODRST LVI 0
Write:
POR:10000000
$FE02
SIM Upper Byte Address
Register (SUBAR)
Read:
RRRRRRRR
Write:
Reset:
$FE03
SIM Break Flag Control
Register (SBFCR)
Read:
BCFERRRRRRR
Write:
Reset: 0
$FE09
Interrupt Status Register 1
(INT1)
Read: IF6 IF5 IF4 IF3 IF2 IF1 0 0
Write:RRRRRRRR
Reset:00000000
$FE0A
Interrupt Status Register 2
(INT2)
Read: IF14 IF13 IF12 IF11 IF10 IF9 IF8 IF7
Write:RRRRRRRR
Reset:00000000
$FE0B
Interrupt Status Register 3
(INT3)
Read: 000000IF16IF15
Write:RRRRRRRR
Reset:00000000
= Unimplemented
Figure 19-2. SIM I/O Register Summary
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