参数资料
型号: UPD780021AYGC-XXX-8BS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8.38 MHz, MICROCONTROLLER, PQFP64
封装: 14 X 14 MM, PLASTIC, LQFP-64
文件页数: 16/96页
文件大小: 723K
代理商: UPD780021AYGC-XXX-8BS
23
PD780021A, 780022A, 780023A, 780024A, 780021AY, 780022AY, 780023AY, 780024AY
Data Sheet U14042EJ4V0DS
5.2 Clock Generator
A system clock generator is incorporated.
The minimum instruction execution time can be changed.
Expanded-specification products of
PD780021A, 780022A, 780023A, 780024A
0.166
s/0.333 s/0.666 s/1.33 s/2.66 s
(@12 MHz, VDD = 4.5 to 5.5 V operation with main system clock)
122
s (@32.768 kHz, VDD = 4.0 to 5.5 V operation with subsystem clock)
PD780021AY, 780022AY, 780023AY, 780024AY, and conventional products of PD780021A, 780022A,
780023A, 780024A
0.238
s/0.48 s/0.95 s/1.91 s/3.81 s (@8.38 MHz, VDD = 4.0 to 5.5 V operation with main system clock)
122
s (@32.768 kHz, VDD = 4.0 to 5.5 V operation with subsystem clock)
Figure 5-1. Clock Generator Block Diagram
XT1
XT2
X1
X2
fXT
fX
Subsystem
clock
oscillator
Watch timer, clock
output function
Prescaler
Main system
clock
oscillator
Clock to peripheral
hardware
CPU clock
(fCPU)
Standby
controller
Wait
controller
2
fX
22
fX
23
fX
24
fX
fXT
2
Prescaler
Selector
STOP
2
1
HALT
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