mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 142

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
9.2 Introduction
Data Sheet
142
9.6.4
9.7
9.7.1
9.7.2
9.8
9.8.1
9.8.2
9.8.3
This section describes the system integration module (SIM). Together
with the CPU, the SIM controls all MCU activities. A block diagram of the
SIM is shown in
input/output (I/O) registers. The SIM is a system state controller that
coordinates CPU and exception timing. The SIM is responsible for:
Table 9-1
•
•
•
•
•
Bus clock generation and control for CPU and peripherals:
– Stop/wait/reset/break entry and recovery
– Internal clock control
Master reset control, including power-on reset (POR) and COP
timeout
Interrupt control:
– Acknowledge timing
– Arbitration control timing
– Vector address generation
CPU enable/disable timing
Modular architecture expandable to 128 interrupt sources
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Status Flag Protection in Break Mode . . . . . . . . . . . . . . . . 158
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 162
SIM Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . 163
SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . 164
System Integration Module (SIM)
shows the internal signal names used in this section.
Figure
9-1.
Table 9-1
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
is a summary of the SIM
Freescale Semiconductor