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146 EPSON S1C88650 TECHNICAL MANUAL
8 ELECTRICAL CHARACTERISTICS
■ Serial interface
• Clock synchronous master mode
Item
Symbol
Min. Typ. Max. Unit
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
t
smd
t
sms
t
smh
ns
ns
ns
Note
250
100
100
Condition: V
DD
= 1.8 to 3.6 V, V
SS
= 0 V, Ta = 25°C, V
IH1
= 0.8V
DD
, V
IL1
= 0.2V
DD
, V
OH
= 0.8V
DD
, V
OL
= 0.2V
DD
• Clock synchronous slave mode
Item
Symbol
Min. Typ. Max. Unit
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
t
ssd
t
sss
t
ssh
ns
ns
ns
Note
100
100
250
Condition: V
DD
= 1.8 to 3.6 V, V
SS
= 0 V, Ta = 25°C, V
IH1
= 0.8V
DD
, V
IL1
= 0.2V
DD
, V
OH
= 0.8V
DD
, V
OL
= 0.2V
DD
• Asynchronous system
Min. Typ. Max.
t
sa
1
t
sa
2
s
s
1
2
Note) 1
2
Start bit detection error time is a logical delay time from inputting the start bit until internal sampling begins operating.
(Time as far as AC is excluded.)
Erroneous start bit detection range time is a logical range to detect whether a LOW level (start bit) has been input again
after a start bit has been detected and the internal sampling clock has started.
When a HIGH level is detected, the start bit detection circuit is reset and goes into a wait status until the next start bit.
(Time as far as AC is excluded.)
0
9
t
/16
t
/16
10
t
/16
Item
Symbol
Unit
Start bit detection error time
Erroneous start bit detection range time
Note
Condition: V
DD
= 1.8 to 3.6 V, V
SS
= 0 V, Ta = 25°C
SCLK OUT
SOUT
SIN
VOH
VOH
VOL
tsms tsmh
tsmd
VIH1
VIL1
VOL
SCLK IN
SOUT
SIN
VIH1
VOH
VOL
tsss tssh
tssd
VIH1
VIL1
VIL1
t
sa
1
t
t
sa
2
SIN
Start bit
Sampling
clock
Erroneous
start bit
detection signal
Stop bit