Table of Contents
Advertisement
23 ELECTRICAL CHARACTERISTICS
23.12 I
C (I2C) Characteristics
2
Unless otherwise specified: V
DD
Item
Symbol
SCLn frequency
f
SCL
Hold time (repeated)
t
HD:STA
START condition *
SCLn Low pulse width
t
LOW
SCLn High pulse width
t
HIGH
Repeated START condition
t
SU:STA
setup time
Data hold time
t
HD:DAT
Data setup time
t
SU:DAT
SDAn, SCLn rise time
t
r
SDAn, SCLn fall time
t
f
STOP condition setup time t
SU:STO
Bus free time
t
BUF
t
f
t
r
SDAn
t
HD:DAT
t
f
SCLn
S
t
HD:STA
1/f
SCL
1st clock cycle
23.13 LCD Driver (LCD32B) Characteristics
The LCD driver characteristics varies depending on the panel load (panel size, drive duty, number of display pixels
and display contents), so evaluate them by connecting to the actually used LCD panel.
Unless otherwise specified: V
DD
No panel load
Item
LCD drive voltage (1/5 bias)
LCD32BPWR.BIASSEL bit = 0
23-12
= 1.8 to 3.6 V, V
= 0 V, Ta = -40 to 85 °C
SS
Condition
t
SU:DAT
t
t
r
HIGH
t
LOW
= 2.5 to 3.6 V, V
= 0 V, Ta = 25 °C, LCD32BTIM2.BSTC[1:0] bits = 0x1 (Voltage booster clock = 2 kHz),
SS
Symbol
V
Connect 1 MW load resistor between V
C1
V
Connect 1 MW load resistor between V
C2
V
Connect 1 MW load resistor between V
C3
V
Connect 1 MW load resistor between V
C4
V
Connect 1 MW
LCD32BPWR.LC[3:0] bits = 0x0
C5
load resistor
LCD32BPWR.LC[3:0] bits = 0x1
between V
LCD32BPWR.LC[3:0] bits = 0x2
SS
and V
LCD32BPWR.LC[3:0] bits = 0x3
C5
LCD32BPWR.LC[3:0] bits = 0x4
LCD32BPWR.LC[3:0] bits = 0x5
LCD32BPWR.LC[3:0] bits = 0x6
LCD32BPWR.LC[3:0] bits = 0x7
LCD32BPWR.LC[3:0] bits = 0x8
LCD32BPWR.LC[3:0] bits = 0x9
LCD32BPWR.LC[3:0] bits = 0xa
LCD32BPWR.LC[3:0] bits = 0xb
LCD32BPWR.LC[3:0] bits = 0xc
LCD32BPWR.LC[3:0] bits = 0xd
LCD32BPWR.LC[3:0] bits = 0xe
LCD32BPWR.LC[3:0] bits = 0xf
Seiko Epson Corporation
Standard mode
Min.
Typ.
Max.
–
0
100
4.0
–
–
–
4.7
–
4.0
–
–
4.7
–
–
0
–
–
–
250
–
–
–
1,000
–
–
300
–
4.0
–
4.7
–
–
* After this period, the first clock pulse is generated.
t
SU:STA
t
HD:STA
Sr
9th clock cycle
Condition
and V
SS
C1
and V
SS
C2
and V
SS
C3
and V
SS
C4
Fast mode
Min.
Typ.
Max.
–
0
400
0.6
–
–
–
1.3
–
0.6
–
–
0.6
–
–
0
–
–
–
100
–
–
–
300
–
–
300
–
0.6
–
1.3
–
–
t
BUF
t
SU:STO
P
S
S: START condition
Sr: Repeated START condition
P: STOP condition
Min.
Typ.
Max.
0.18 ×
–
0.22 ×
V
(Typ.)
V
(Typ.)
C5
C5
0.38 ×
–
0.42 ×
V
(Typ.)
V
(Typ.)
C5
C5
0.58 ×
–
0.62 ×
V
(Typ.)
V
(Typ.)
C5
C5
0.77 ×
–
0.81 ×
V
(Typ.)
V
(Typ.)
C5
C5
4.39
4.62
4.85
4.47
4.70
4.94
4.53
4.77
5.01
4.61
4.85
5.09
4.68
4.93
5.18
4.76
5.01
5.26
4.84
5.09
5.34
4.91
5.17
5.43
4.99
5.25
5.51
5.06
5.33
5.60
5.14
5.41
5.68
5.22
5.49
5.76
5.28
5.56
5.84
5.36
5.64
5.92
5.43
5.72
6.01
5.51
5.80
6.09
S1C31W74 TECHNICAL MANUAL
(Rev. 1.1)
Unit
kHz
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Advertisement
Table of Contents
