參數(shù)資料
型號(hào): μPD780033
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(yè)數(shù): 18/44頁(yè)
文件大?。?/td> 238K
代理商: ΜPD780033
18
m
PD780031, 780032, 780033, 780034
5.2 Clock Generator
A system clock generator is incorporated.
The instruction execution time can also be changed.
0.24
m
s/0.48
m
s/0.95
m
s/1.91
m
s/3.81
m
s (main system clock: at 8.38-MHz operation)
122
m
s (subsystem clock: at 32.768-kHz operation)
Figure 5-1. Block Diagram of Clock Generator
XT1
XT2
X1
X2
f
XT
f
X
Subsystem
clock
oscillator
Watch timer, clock
output function
Prescaler
Main system
clock
oscillator
Clock to peripheral
hardware
CPU clock
(f
CPU
)
Standby
control
circuit
Wait control
circuit
2
f
X
2
2
f
X
2
3
f
X
2
4
f
X
f
XT
2
Prescaler
Selector
STOP
2
1
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