mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 288

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

19.2 Introduction
Advance Information
288
19.8
19.8.1
19.8.2
19.8.3
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 19-1
•
•
•
•
•
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
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . 308
SIM Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . 310
SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . 311
shows the internal signal names used in this section.
Figure
19-1.
Table 19-1
is a summary of the SIM
MC68HC908GP20
Freescale Semiconductor
—
Rev 2.1