MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 213
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MC68HC908GZ8
Manufacturer Part Number
MC68HC908GZ8
Description
M68HC08 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC908GZ8.pdf
(314 pages)
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Chapter 16
System Integration Module (SIM)
16.1 Introduction
This section describes the system integration module (SIM). Together with the central processor unit
(CPU), the SIM controls all microcontroller unit (MCU) activities. A block diagram of the SIM is shown in
Figure
controller that coordinates CPU and exception timing.
Freescale Semiconductor
PIN LOGIC
RESET
16-1.
Table 16-1
V
DD
INTERNAL
PULLUP
DEVICE
is a summary of the SIM input/output (I/O) registers. The SIM is a system state
SIM RESET STATUS REGISTER
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
RESET PIN CONTROL
POR CONTROL
STOP/WAIT
CONTROL
CONTROL
AND PRIORITY DECODE
INTERRUPT CONTROL
CLOCK
Figure 16-1. SIM Block Diagram
CLOCK GENERATORS
RESET
COUNTER
SIM
÷ 2
CONTROL
MASTER
RESET
MODULE STOP
MODULE WAIT
CPU STOP (FROM CPU)
CPU WAIT (FROM CPU)
SIMOSCEN (TO CGM)
CGMXCLK (FROM CGM)
CGMOUT (FROM CGM)
INTERNAL CLOCKS
LVI (FROM LVI MODULE)
ILLEGAL OPCODE (FROM CPU)
ILLEGAL ADDRESS (FROM ADDRESS
MAP DECODERS)
COP (FROM COP MODULE)
INTERRUPT SOURCES
CPU INTERFACE
FORCED MONITOR MODE ENTRY
213
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