參數(shù)資料
型號(hào): UPD75116H
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機(jī)
文件頁(yè)數(shù): 19/66頁(yè)
文件大?。?/td> 472K
代理商: UPD75116H
19
μ
PD75116H,75117H
5.2
CLOCK GENERATOR
The clock generator operation is determined by the processor clock control register (PCC).
This circuit can also change the instruction execution time.
0.95
μ
s/1.91
μ
s/15.3
μ
s (4.19 MHz operation)
Fig. 5-1 Clock Generator Block Diagram
*
Instruction execution
Remarks
1.
2.
3.
4.
5.
CHARACTERISTICS" in
12. "ELECTRICAL SPECIFICATIONS"
for t
CY
.
f
XX
= Crystal/ceramic oscillator frequency
f
X
= External clock frequency
Φ
= CPU Clock
PCC : Processor clock control register
One
Φ
clock cycle (t
CY
) is one machine cycle. See "AC
#
X1
f
XX
or f
X
Basic Interval Timer (BT)
Clock Output Circuit
Timer/Event Counter
Serial Interface
Frequency Divider
1/2
S
HALT F/F
S
Wait Release Signal from BT
RESET Signal (Internal Reset)
Standby Release Signal from
Interrupt Control Circuit
STOP F/F
Q
S
R
PCC2,
PCC3
Clear
Oscillation
Stop
PCC
4
I
System Clock
Oscillation
Circuit
R
Q
HALT
*
STOP
*
Frequency
Divider
1/4
CPU
Clock Output Circuit
Φ
1/16
X2
1/8 to 1/4096
PCC0
PCC1
PCC2
PCC3
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