Epson S1C63558 7.6 Serial Interface (1), (2) AC Characteristics, SIN, SIN, SIN, SOUT, SOUT, clock, Stop bit, Sampling, Start bit, Erroneous, start bit, <Slave mode

CHAPTER 7: ELECTRICAL CHARACTERISTICS

7.6 Serial Interface (1), (2) AC Characteristics

1. Clock synchronous master mode (during 1 MHz operation)

Condition: VDD=3.0V, VSS=0V, Ta=-20 to 70°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD

Item	Symbol	Min.	Typ.	Max.	Unit
Transmitting data output delay time	tsmd			200	ns
Receiving data input set-up time	tsms	400			ns
Receiving data input hold time	tsmh	200			ns

Note that the maximum clock frequency is limited to 1 MHz.

2. Clock synchronous slave mode (during 1 MHz operation)

Condition: VDD=3.0V, VSS=0V, Ta=-20 to 70°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD

Item	Symbol	Min.	Typ.	Max.	Unit
Transmitting data output delay time	tssd			500	ns
Receiving data input set-up time	tsss	400			ns
Receiving data input hold time	tssh	200			ns

Note that the maximum clock frequency is limited to 1 MHz.

<Master mode>

VOH

SCLK OUT

VOL

tsmd

SOUT

VOH

VOL

SIN

VIH1

tsms

tsmh

VIL1

<Slave mode>

VIH1

SCLK IN

VIL1

tssd

SOUT

VOH

VOL

SIN

VIH1

tsss

tssh

VIL1

3. Asynchronous system

Condition: VDD=2.2 to 5.5V, VSS=0V, Ta=-20 to 70°C

Item

Symbol

Min.

Typ.

Max.

Unit

Start bit detection error time ∗1

tsa1

0

t/16

s

Erroneous start bit detection range time ∗2

tsa2

9t/16

10t/16

s

∗1 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.)

∗2 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.)

		Start bit			Stop bit
SIN
Sampling	tsa1
clock
Erroneous				t
start bit
detection signal			tsa2

164 EPSON S1C63558 TECHNICAL MANUAL