參數(shù)資料
型號: μPD789197
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 32/146頁
文件大?。?/td> 630K
代理商: ΜPD789197
Preliminary Product Information
32
μ
PD789186, 789187, 789196, 789197
6.2
Clock Generator
6.2.1
Clock generator functions
The clock generator generates the clock pulse to be supplied to the CPU and peripheral hardware. There are two
types of system clock oscillators:
Main system clock oscillator (ceramic or crystal oscillation)
This circuit generates a frequency of 1.0 to 5.0 MHz. Oscillation can be stopped by executing the STOP
instruction or by using the processor clock control register.
Subsystem clock oscillator
This circuit generates 32.768 kHz. Oscillation can be stopped by using the suboscillation mode register.
6.2.2
Clock generator configuration
The clock generator consists of the following hardware.
Table 6-4. Clock Generator Configuration
Item
Configuration
Control register
Processor clock control register (PCC)
Suboscillation mode register (SCKM)
Subclock control register (CSS)
Oscillators
Main system clock oscillator
Subsystem clock oscillator
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