s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 78

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
7.3 Reset and System Initialization
The MCU has these reset sources:
All of these resets produce the vector $FFFE–FFFF ($FEFE–FEFF in monitor mode) and assert the
internal reset signal (IRST). IRST causes all registers to be returned to their default values and all
modules to be returned to their reset states.
An internal reset clears the SIM counter (see
the resets sets a corresponding bit in the SIM reset status register (SRSR) (see
7.3.1 External Pin Reset
Pulling the asynchronous RST pin low halts all processing. The PIN bit of the SIM reset status register
(SRSR) is set as long as RST is held low for a minimum of 67 CGMXCLK cycles, assuming that neither
the POR nor the LVI was the source of the reset. See
timing.
78
•
•
•
•
•
•
Power-on reset module (POR)
External reset pin (RST)
Computer operating properly module (COP)
Low-voltage inhibit module (LVI)
Illegal opcode
Illegal address
CGMOUT
RST
IAB
PC
Reset Type
All others
POR/LVI
Figure 7-4. External Reset Timing
MC68HC908AZ32A Data Sheet, Rev. 2
Table 7-3. PIN Bit Set Timing
7.4 SIM
Number of Cycles Required to Set PIN
Table 7-3
Counter), but an external reset does not. Each of
4163 (4096 + 64 + 3)
67 (64 + 3)
VECT H
for details.
VECT L
Figure 7-4
7.7 SIM
Freescale Semiconductor
shows the relative
Registers).