参数资料
型号: UPD750066CU(A)-XXX
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDIP42
封装: 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件页数: 17/83页
文件大小: 730K
代理商: UPD750066CU(A)-XXX
24
PD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)
Data Sheet U10165EJ2V1DS
Figure 6-1. Clock Generator Block Diagram
XT1
X1
XT2
X2
fXT
fX
Subsystem
clock oscillator
Main system
clock oscillator
4
HALTNote
STOPNote
WM.3
SCC
SCC3
SCC0
PCC0
PCC1
PCC2
PCC3
PCC2,
PCC3
Clear
STOP F/F
Q
S
R
Oscillation
stop
HALT F/F
S
R
Wait release signal from BT
RESET signal
Standby release signal from
interrupt control circuit
CPU
INT0 noise eliminator
Clock output circuit
Φ
1/4
Divider
1/1 to 1/4096
Divider
1/2 1/4 1/16
Basic interval timer (BT)
Timer/event counter
Serial interface
Watch timer
INT0 noise eliminator
Clock output circuit
PCC
Q
Selector
Internal
bus
Watch timer
Note Instruction execution
Remarks 1.
fX = Main system clock frequency
2.
fXT = Subsystem clock frequency
3.
Φ = CPU clock
4.
PCC: Processor Clock Control Register
5.
SCC: System Clock Control Register
6.
One clock cycle (tCY) of the CPU clock is equal to one machine cycle of the instruction.
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