参数资料
型号: MC68HC908RK2DW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PDSO20
封装: PLASTIC, SOIC-20
文件页数: 6/158页
文件大小: 1020K
代理商: MC68HC908RK2DW
MC68HC908RK2 Data Sheet, Rev. 5.1
Freescale Semiconductor
103
Chapter 10
System Integration Module (SIM)
10.1 Introduction
This section describes the system integration module (SIM). Together with the central processor unit
(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 Figure 10-2. Figure 10-1 is a summary of the
SIM input/output (I/O) registers.
The SIM is responsible for:
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 computer operating properly (COP)
timeout
Interrupt control:
Acknowledge timing
Arbitration control timing
Vector address generation
CPU enable/disable timing
Addr.
Register Name
Bit 7
654321
Bit 0
$FE00
SIM Break Status Register
(SBSR)
Read:
RRRRRR
SBSW
R
Write:
See Note
Reset:
0
Note: Writing a 0 clears SBSW
$FE01
SIM Reset Status Register
(SRSR)
Read:
POR
PIN
COP
ILOP
ILAD
0
LVI
0
Write:
POR:
1
XXXXXXX
$FE02
SIM Break Flag Control
Register (SBFCR)
Read:
BCFE
RRRRRRR
Write:
Reset:
00000000
= Unimplemented
R
= Reserved
X = Indeterminate
Figure 10-1. SIM I/O Register Summary
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