Datasheet

MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
96 System Integration Module (SIM) MOTOROLA
System Integration Module (SIM)
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Figure 7-19. Stop Mode Recovery from Interrupt
7.9 SIM Registers
The SIM has three memory mapped registers. Table 7-4 shows the
mapping of these registers.
7.9.1 SIM Reset Status Register
This register contains seven flags that show the source of the last reset.
Clear the SIM reset status register by reading it. A power-on reset sets
the POR bit and clears all other bits in the register.
BUSCLKX4
INTERRUPT
ADDRESS BUS
STOP + 2 STOP + 2 SP SP – 1 SP – 2 SP – 3
STOP +1
STOP RECOVERY PERIOD
Table 7-4. SIM Registers
Address Register Access Mode
$FE00 BSR User
$FE01 SRSR User
$FE03 BFCR User
Address: $FE01
Bit 7654321Bit 0
Read: POR PIN COP ILOP ILAD MODRST LVI 0
Write:
POR:10000000
= Unimplemented
Figure 7-20. SIM Reset Status Register (SRSR)