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UPD178002 Datasheet(PDF) 34 Page - NEC

Part # UPD178002
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD178002 Datasheet(HTML) 34 Page - NEC

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34
µPD178002, 178003
Data Sheet U12628EJ3V0DS00
(2) Serial interface (TA = –40 to +85
°C, VDD = 3.5 to 5.5 V)
(a) Serial interface channel 1
(i)
3-wire serial I/O mode (SCK1 ... internal clock output)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK1 cycle time
tKCY1
4.5 V
≤ VDD ≤ 5.5 V
800
ns
3.5 V
≤ VDD < 4.5 V
1600
ns
SCK1 high-/low-level width
tKH1,
4.5 V
≤ VDD ≤ 5.5 V
tKCY9/2 – 50
ns
tKL1
3.5 V
≤ VDD < 4.5 V
tKCY9/2 – 100
ns
SI1 setup time (to SCK1
↑)tSIK1
4.5 V
≤ VDD ≤ 5.5 V
100
ns
3.5 V
≤ VDD < 4.5 V
150
ns
SI1 hold time (from SCK1
↑)tKSI1
400
ns
SO1 output delay time from SCK1
↓ tKSO1
C = 100 pFNote
300
ns
Note C is the load capacitance of the SO1 output line.
(ii) 3-wire serial I/O mode (SCK1 ... external clock input)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK1 cycle time
tKCY2
4.5 V
≤ VDD ≤ 5.5 V
800
ns
3.5 V
≤ VDD < 4.5 V
1600
ns
SCK1 high-/low-level width
tKH2,
4.5 V
≤ VDD ≤ 5.5 V
400
ns
tKL2
3.5 V
≤ VDD < 4.5 V
800
ns
SI1 setup time (to SCK1
↑)tSIK2
100
ns
SI1 hold time (from SCK1
↑)tKSI2
400
ns
SO1 output delay time from SCK1
↓ tKSO2
C = 100 pFNote
300
ns
SCK1 rise/fall time
tR2, tF2
1000
ns
Note C is the load capacitance of the SO1 output line.


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