UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 175

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

(2) Serial transfer operation
SCK cycle time
SCK high/low level
width
SI setup time
(referred to SCK )
SI hold time
(referred to SCK )
SCK
delay time
SCK cycle time
SCK high/low level
width
SI setup time
(referred to SCK )
SI hold time
(referred to SCK )
SCK
delay time
(a) Two-wire and three-wire serial I/O modes (SCK ... Internal clock output):
(b) Two-wire and three-wire serial I/O modes (SCK ... External clock input):
Parameter
Parameter
Note R
Note R
SO output
SO output
L
L
and C
and C
Symbol
Symbol
L
L
t
t
t
t
t
t
t
t
t
are the resistance and capacitance of the SO output line load respectively.
t
are the resistance and capacitance of the SO output line load respectively.
t
t
KSO2
KCY1
KSO1
KCY2
SIK1
KSI1
KH2
SIK2
KSI2
KH1
KL2
KL1
(t
(t
KCY
KCY
3200
1600
1340
1600
2680
3800
Min.
Min.
800
400
100
400
/2) – 150
150
400
/2) – 50
Typ.
Typ.
Max.
Max.
1000
1000
300
250
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
V
R
C
V
V
R
C
DD
DD
DD
DD
L
L
L
L
= 1 k
= 100 pF
= 1 k
= 100 pF
= 4.5 to 6.0 V
= 4.5 to 6.0 V
= 4.5 to 6.0 V
= 4.5 to 6.0 V
Note
Note
Conditions
Conditions
V
V
f
f
f
f
X
X
X
X
DD
DD
= 6.0 MHz
= 4.19 MHz
= 6.0 MHz
= 4.19 MHz
= 4.5 to 6.0 V
= 4.5 to 6.0 V
PD75238
175