21 ELECTRICAL CHARACTERISTICS
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
21-11
TECHNICAL MANUAL (Rev. 1.0)
Master and slave modes
SPICLKn
(CPOL, CPHA) = (1, 0) or (0, 1)
SPICLKn
(CPOL, CPHA) = (1, 1) or (0, 0)
SDIn
SDOn
t
SCYC
t
SDO
t
SCKH
t
SDS
t
SDH
t
SCKL
Slave mode
#SPISSn
SPICLKn
(CPOL, CPHA) = (0, 1)
SPICLKn
(CPOL, CPHA) = (1, 0)
SDIn
SDOn
t
SDD
Hi-Z
t
SSH
t
SDZ
t
SSS
21.11 I
2
C (I2C) Characteristics
Unless otherwise specified: V
DD
= 1.8 to 5.5 V, V
SS
= 0 V, Ta = -40 to 85
°
C
Item
Symbol
Condition
Standard mode
Fast mode
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
SCLn frequency
f
SCL
0
–
100
0
–
400
kHz
Hold time (repeated)
START condition
*
t
HD:STA
4.0
–
–
0.6
–
–
µs
SCLn Low pulse width
t
LOW
4.7
–
–
1.3
–
–
µs
SCLn High pulse width
t
HIGH
4.0
–
–
0.6
–
–
µs
Repeated START condition
setup time
t
SU:STA
4.7
–
–
0.6
–
–
µs
Data hold time
t
HD:DAT
0
–
–
0
–
–
µs
Data setup time
t
SU:DAT
250
–
–
100
–
–
ns
SDAn, SCLn rise time
t
r
–
–
1,000
–
–
300
ns
SDAn, SCLn fall time
t
f
–
–
300
–
–
300
ns
STOP condition setup time t
SU:STO
4.0
–
–
0.6
–
–
µs
Bus free time
t
BUF
4.7
–
–
1.3
–
–
µs
*
After this period, the first clock pulse is generated.
SDAn
SCLn
S
t
f
t
BUF
t
HD:STA
1/f
SCL
1st clock cycle
t
f
9th clock cycle
S: START condition
Sr: Repeated START condition
P: STOP condition
t
r
t
HD:DAT
t
HIGH
t
SU:STA
t
LOW
t
r
t
SU:DAT
Sr
P
S
t
HD:STA
t
SU:STO