mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 120

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
Data Sheet
120
PIN LOGIC
Signal Name
RESET
Address bus
BUSCLKX4
BUSCLKX2
PORRST
Data bus
INTERNAL
PULL-UP
IRST
R/W
V
DD
Buffered clock from the internal, RC or XTAL oscillator circuit.
The BUSCLKX4 frequency divided by two. This signal is again divided by two in the SIM to
generate the internal bus clocks (bus clock = BUSCLKX4 ÷ 4).
Internal address bus
Internal data bus
Signal from the power-on reset module to the SIM
Internal reset signal
Read/write signal
SIM RESET STATUS REGISTER
RESET PIN CONTROL
POR CONTROL
STOP/WAIT
CONTROL
CONTROL
AND PRIORITY DECODE
INTERRUPT CONTROL
CLOCK
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 14-1. Signal Name Conventions
Figure 14-1. SIM Block Diagram
System Integration Module (SIM)
Go to: www.freescale.com
CLOCK GENERATORS
RESET
COUNTER
SIM
÷2
CONTROL
MASTER
RESET
Description
LVI RESET (FROM LVI MODULE)
FORCED MON MODE ENTRY (FROM MENRST MODULE)
MODULE STOP
MODULE WAIT
CPU STOP (FROM CPU)
CPU WAIT (FROM CPU)
SIMOSCEN (TO OSCILLATOR)
COP CLOCK
BUSCLKX4 (FROM OSCILLATOR)
BUSCLKX2 (FROM OSCILLATOR)
INTERNAL CLOCKS
ILLEGAL OPCODE (FROM CPU)
ILLEGAL ADDRESS (FROM ADDRESS
MAP DECODERS)
COP TIMEOUT (FROM COP MODULE)
INTERRUPT SOURCES
CPU INTERFACE
MC68HC908QF4 — Rev. 1.0
MOTOROLA