參數(shù)資料
型號: UPD754264GS
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 4位單晶片微控制器
文件頁數(shù): 18/68頁
文件大?。?/td> 318K
代理商: UPD754264GS
18
μ
PD754264
Figure 7-1. Clock Generator Block Diagram
Note
Instruction execution
Remarks 1.
f
X
: System clock frequency
2.
F = CPU clock
3.
PCC: Processor Clock Control Register
4.
One clock cycle (t
CY
) of the CPU clock is equal to one machine cycle of the instruction.
X1
X2
System
clock
oscillator
Oscillation stops
1/2 1/4 1/16
f
X
Divider
1/4
Φ
HALT F/F
S
R
Q
S
R
Q
STOP F/F
PCC0
PCC1
PCC2
PCC3
PCC2,
PCC3
clear
HALT
Note
STOP
Note
Wait release signal from BT
Reset signal
Standby release signal from
interrupt control circuit
PCC
4
· Basic interval timer (BT)
· Timer counter
· INT0 noise eliminator
1/1~1/4096
· CPU
· INT0 noise
eliminator
Divider
S
I
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