15.2.5
LCD Characteristics
Table 15-7 shows the LCD characteristics of the H8/3887 Series.
Table 15-7 LCD Characteristics (H8/3887 Series)
VCC = 1.8 V to 5.5 V, AVCC = 1.8 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C
(including subactive mode) unless otherwise indicated.
Applicable Values
Test
Item
Symbol Pins Min Typ Max Unit Conditions
Notes
1
Segment driver VDS
drop voltage
SEG1 to
SEG40
—
—
0.6
0.3
9.0
V
ID = 2 µA
V1 = 2.7 to 5.5 V
*
1
Common driver VDC
drop voltage
COM1 to
COM4
—
—
V
ID = 2 µA
V1 = 2.7 to 5.5 V
*
LCD power
supply split-
resistance
RLCD
0.5
3.0
MΩ
Between V1
and VSS
2
On-chip liquid VLP
crystal display
power supply
voltage
V0
V1
—
5.0
—
V
*
Reference
value
3
Liquid crystal VLCD
display voltage
2.2
—
5.5
V
*
Notes: 1. The voltage drop from power supply pins V1, V2, V3, and VSS to each segment pin or
common pin.
2. The output voltage in step-up constant-voltage power supply operation.
3. When the liquid crystal display voltage is supplied from an external power source,
ensure that the following relationship is maintained: V1 ≥ V2 ≥ V3 ≥ VSS.
390
ETC [ ETC ]
