mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 98

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
8.2 Introduction
Technical Data
98
8.6.5
8.7
8.7.1
8.7.2
8.8
8.8.1
8.8.2
8.8.3
This section describes the system integration module (SIM). Together
with the CPU, the SIM controls all MCU activities. The SIM is a system
state controller that coordinates CPU and exception timing. A block
diagram of the SIM is shown in
the SIM I/O registers. The SIM is responsible for:
Table 8-1
•
•
•
•
•
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Status Flag Protection in Break Mode . . . . . . . . . . . . . . . . 114
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
SIM Break Status Register (SBSR) . . . . . . . . . . . . . . . . . . 118
SIM Reset Status Register (SRSR) . . . . . . . . . . . . . . . . . . 119
SIM Break Flag Control Register (SBFCR) . . . . . . . . . . . . 120
System Integration Module (SIM)
shows the internal signal names used in this section.
Figure
8-1.
Figure 8-2
MC68HC908JB16
Freescale Semiconductor
is a summary of
—
Rev. 1.1