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LCD drive voltage-load characteristic (1/3 bias) LCD drive voltage-load characteristic (1/2 bias)
V
= 5.5 V, Ta = 25°C, Typ. value, LCD8DPWR.LC[4:0] bits = 0x1f, V
DD
when a load is connected to the V
6.0
5.9
5.8
LCD8DPWR.VCSEL bit = 0
5.7
5.6
5.5
5.4
0
5
10
LCD circuit current-load characteristic (1/3 bias) LCD circuit current-load characteristic (1/2 bias)
V
= 5.5 V, Ta = 25°C, Typ. value, LCD8DPWR.LC[4:0] bits = 0x1f, V
DD
when a load is connected to the V
45
LCD8DPWR.VCSEL bit = 0
40
35
30
25
20
15
10
5
0
0
5
10
23.13 R/F Converter (RFC) Characteristics
R/F converter characteristics change depending on conditions (board pattern, components used, etc.). Use these
characteristic values as a reference and perform evaluation using the actual printed circuit board.
Unless otherwise specified: V
DD
Item
Reference/sensor oscillation frequency
Reference/sensor oscillation frequency IC
deviation
Reference resistor/resistive sensor
resistance
Reference capacitance
Time base counter clock frequency
High level Schmitt input threshold voltage
Low level Schmitt input threshold voltage
Schmitt input hysteresis voltage
R/F converter operating current
*1 In this characteristic, unevenness between production lots, and variations in measurement board, resistances and capacitances
are taken into account.
S1C31W65 TECHNICAL MANUAL
(Rev. 1.1)
pin only
C3
1
15
20
25
I
[µA]
VC3
pin only
C3
1
15
20
25
-I
[µA]
VC3
= 1.8 to 5.5 V, V
= 0 V, Ta = -40 to 105°C
SS
Symbol
f
RFCLK
DIC Ta = 25°C
Df
RFCLK/
R
R
REF,
SEN
C
REF
f
TCCLK
V
T+
V
T-
DV
T
I
R
RFC
REF
C
REF
Seiko Epson Corporation
23 ELECTRICAL CHARACTERISTICS
= 5.5 V, Ta = 25°C, Typ. value, LCD8DPWR.LC[4:0] bits = 0x0f
DD
(V
reference voltage)/0x1f (V
C2
when a load is connected to the V
6.0
5.5
5.0
4.5
4.0
3.5
3.0
0
5
= 5.5 V, Ta = 25°C, Typ. value, LCD8DPWR.LC[4:0] bits = 0x0f,
DD
when a load is connected to the V
25
20
15
10
5
0
0
5
Condition
V
DD
*1
5.5 V
/R
= 100 kW,
SEN
= 1,000 pF, Ta = 25°C
3.6 V
reference voltge),
C1
pin only
C3
1
LCD8DPWR.VCSEL bit = 0
10
15
20
I
[µA]
VC3
pin only
C3
LCD8DPWR.VCSEL bit = 1
10
15
20
-I
[µA]
VC3
Min.
Typ.
Max.
1
–
1,000
-40
–
40
10
–
-
100
–
–
–
–
33
0.5 × V
–
0.8 × V
DD
0.2 × V
–
0.5 × V
DD
165
–
–
–
165
230
–
75
110
25
25
Unit
kHz
%
kW
pF
MHz
V
DD
V
DD
mV
µA
µA
23-19
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