Datasheet

System Integration Module (SIM)
MC68HC908GR16 Data Sheet, Rev. 5.0
180 Freescale Semiconductor
Figure 15-4. System Clock Signals
Addr.Register Name Bit 7654321Bit 0
$FE00
Break Status Register
(BSR)
See page 192.
Read:
RRRRRR
SBSW
R
Write: Note
(1)
Reset:00000000
1. Writing a a 0 clears SBSW.
$FE01
SIM Reset Status Register
(SRSR)
See page 193.
Read: POR PIN COP ILOP ILAD MODRST LVI 0
Write:
POR:10000000
$FE03
Break Flag Control Register
(BFCR)
See page 194.
Read:
BCFERRRRRRR
Write:
Reset: 0
$FE04
Interrupt Status Register 1
(INT1)
See page 188.
Read: IF6 IF5 IF4 IF3 IF2 IF1 0 0
Write:RRRRRRRR
Reset:00000000
$FE05
Interrupt Status Register 2
(INT2)
See page 189.
Read: IF14 IF13 IF12 IF11 IF10 IF9 IF8 IF7
Write:RRRRRRRR
Reset:00000000
$FE06
Interrupt Status Register 3
(INT3)
See page 189.
Read: 0 0 IF20 IF19 IF18 IF17 IF16 IF15
Write:RRRRRRRR
Reset:00000000
= Unimplemented R = Reserved
Figure 15-3. SIM I/O Register Summary
÷ 2
BUS CLOCK
GENERATORS
SIM
SIM COUNTER
SIMOSCEN
OSCILLATOR (OSC)
OSC2
OSC1
PHASE-LOCKED LOOP (PLL)
CGMXCLK
CGMRCLK
IT12
TO TBM,TIM1,TIM2, ADC
OSCENINSTOP
FROM
CONFIG
TO REST
OF CHIP
IT23
TO REST
OF CHIP