UPD75518 NEC, UPD75518 Datasheet - Page 167

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

(2) Serial transfer
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
t
t
t
are the resistance and capacitance of the SO output line load respectively.
are the resistance and capacitance of the SO output line load respectively.
KCY1
KL1
KH1
SIK1
KSI1
KSO1
KCY2
KL2
KH2
SIK2
KSI2
KSO2
t
t
KCY
KCY
3200
1600
1600
1340
3800
2680
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
f
f
V
R
C
V
V
R
C
X
X
DD
DD
DD
DD
DD
L
L
L
L
= 4.19 MHz
= 6.0 MHz
= 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 f
= 4.5 to 6.0 V f
= 4.5 to 6.0 V
Note
Note
Conditions
Conditions
X
X
PD75518(A)
V
V
= 4.19 MHz
= 6.0 MHz
DD
DD
= 4.5 to 6.0 V
= 4.5 to 6.0 V
167