参数资料
型号: mPD789322
厂商: NEC Corp.
元件分类: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器与2/4/8K字节在系统可编程闪存
文件页数: 24/96页
文件大小: 482K
代理商: MPD789322
Preliminary Product Information U14673EJ1V0PM00
30
PD789322,789324,789326,789327
(3) Subclock control register (CSS)
This register is used to specify whether the main system or subsystem clock oscillator is selected and to
indicate the operating status of the CPU clock.
CSS is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Figure 5-10. Format of Subclock Control Register
Symbol
76
54
32
10
Address
After reset
R/W
CSS
0
CLS
CSS0
0
FFF2H
00H
R/W
Note
CLS
CPU clock operating status
0
Operating on the output of the (divided) main system clock
1
Operating on the output of the subsystem clock
CSS0
Selection of main system clock or subsystem clock oscillator
0
Main system clock oscillator (divided) output
1
Subsystem clock oscillator output
Note Bit 5 is read-only.
Caution Always set bits 0 to 3, 6, and 7 to 0.
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