Datasheet

DocID17943 Rev 6 107/134
STM8L15xx8, STM8L15xR6 Electrical parameters
121
9.3.9 LCD controller (STM8L152xx only)
In the following table, data are guaranteed by Design, not tested in production.
VLCD external capacitor (STM8L152xx only)
The application can achieve a stabilized LCD reference voltage by connecting an external
capacitor C
EXT
to the V
LCD
pin. C
EXT
is specified in Table 45.
Table 45. LCD characteristics
Symbol Parameter Min. Typ. Max. Unit
V
LCD
LCD external voltage 3.6
V
V
LCD0
LCD internal reference voltage 0 2.6
V
LCD1
LCD internal reference voltage 1 2.7
V
LCD2
LCD internal reference voltage 2 2.8
V
LCD3
LCD internal reference voltage 3 3.0
V
LCD4
LCD internal reference voltage 4 3.1
V
LCD5
LCD internal reference voltage 5 3.2
V
LCD6
LCD internal reference voltage 6 3.4
V
LCD7
LCD internal reference voltage 7 3.5
C
EXT
V
LCD
external capacitance 0.1 1 2 µF
I
DD
Supply current
(1)
at V
DD
= 1.8 V
1. LCD enabled with 3 V internal booster (LCD_CR1 = 0x08), 1/4 duty, 1/3 bias, division ratio= 64, all pixels
active, no LCD connected.
3
µA
Supply current
(1)
at V
DD
= 3 V 3
R
HN
(2)
2. R
HN
is the total high value resistive network.
High value resistive network (low drive) 6.6 MΩ
R
LN
(3)
3. R
LN
is the total low value resistive network.
Low value resistive network (high drive) 240 kΩ
V
33
Segment/Common higher level voltage V
LCDx
V
V
34
Segment/Common 3/4 level voltage 3/4V
LCDx
V
23
Segment/Common 2/3 level voltage 2/3V
LCDx
V
12
Segment/Common 1/2 level voltage 1/2V
LCDx
V
13
Segment/Common 1/3 level voltage 1/3V
LCDx
V
14
Segment/Common 1/4 level voltage 1/4V
LCDx
V
0
Segment/Common lowest level voltage 0