CHAPTER 22 ELECTRICAL SPECIFICATIONS (
µ
PD789488, 78F9488, 789489, 78F9489)
User’s Manual U15331EJ4V1UD
355
(3) Serial interface 1A0 (SIO1A0) (T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
(a) 3-wire serial I/O mode, 3-wire serial I/O mode with automatic transmit/receive function
(internal clock output)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
V
DD
= 2.7 to 5.5 V
800
ns
SCK10 cycle time
t
KCY4
V
DD
= 1.8 to 5.5 V
3200
ns
V
DD
= 2.7 to 5.5 V
t
KCY4
/2–50
ns
SCK10 high-/low-level
width
t
KH4
,
t
KL4
V
DD
= 1.8 to 5.5 V
t
KCY4
/2–150
ns
V
DD
= 2.7 to 5.5 V
150
ns
SI10 setup time
(to SCK10
↑
)
t
SIK4
V
DD
= 1.8 to 5.5 V
500
ns
V
DD
= 2.7 to 5.5 V
400
ns
SI10 hold time
(from SCK10
↑
)
t
KSI4
V
DD
= 1.8 to 5.5 V
600
ns
V
DD
= 2.7 to 5.5 V
0
250
ns
Delay time from SCK10
↓
to SO10 output
t
KSO4
R = 1 k
Ω
, C = 100 pF
Note
V
DD
= 1.8 to 5.5 V
0
1000
ns
Note
R and C are the load resistance and load capacitance of the SO10 output line.
(b) 3-wire serial I/O mode, 3-wire serial I/O mode with automatic transmit/receive function
(external clock input)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
V
DD
= 2.7 to 5.5 V
800
ns
SCK10 cycle time
t
KCY5
V
DD
= 1.8 to 5.5 V
3200
ns
V
DD
= 2.7 to 5.5 V
400
ns
SCK10 high-/low-level
width
t
KH5
,
t
KL5
V
DD
= 1.8 to 5.5 V
1600
ns
V
DD
= 2.7 to 5.5 V
100
ns
SI10 setup time
(to SCK10
↑
)
t
SIK5
V
DD
= 1.8 to 5.5 V
150
ns
V
DD
= 2.7 to 5.5 V
400
ns
SI10 hold time
(from SCK10
↑
)
t
KSI5
V
DD
= 1.8 to 5.5 V
600
ns
V
DD
= 2.7 to 5.5 V
0
300
ns
Delay time from SCK10
↓
to SO10 output
t
KSO5
R = 1 k
Ω
, C = 100 pF
Note
V
DD
= 1.8 to 5.5 V
0
1000
ns
Note
R and C are the load resistance and load capacitance of the SO10 output line.