STM8AL3L8X datasheet(103/131 Pages) STMICROELECTRONICS

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STM8AL318x STM8AL3L8x

Electrical parameters

117

9.3.9

LCD controller (STM8AL3L8x only)

In the following table, data are guaranteed by design, not tested in production.

VLCD external capacitor (STM8AL3L8x only)

The application achieves a stabilized LCD reference voltage when connecting an external

capacitor CEXT to the VLCD pin. CEXT is specified in Table 48.

Table 48. LCD characteristics

Symbol

Parameter

Min.

Typ.

Max.

Unit

VLCD

LCD external voltage

3.6

VLCD0

LCD internal reference voltage 0

2.6

VLCD1

LCD internal reference voltage 1

2.7

VLCD2

LCD internal reference voltage 2

2.8

VLCD3

LCD internal reference voltage 3

3.0

VLCD4

LCD internal reference voltage 4

3.1

VLCD5

LCD internal reference voltage 5

3.2

VLCD6

LCD internal reference voltage 6

3.4

VLCD7

LCD internal reference voltage 7

3.5

CEXT

VLCD external capacitance

0.1

µF

IDD

Supply current(1) at VDD = 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 VDD = 3 V

RHN(2)

2. RHN is the total high value resistive network.

High value resistive network (low drive)

6.6

RLN(3)

3. RLN is the total low value resistive network.

Low value resistive network (high drive)

240

V33

Segment/Common higher level voltage

VLCDx

V34

Segment/Common 3/4 level voltage

3/4VLCDx

V23

Segment/Common 2/3 level voltage

2/3VLCDx

V12

Segment/Common 1/2 level voltage

1/2VLCDx

V13

Segment/Common 1/3 level voltage

1/3VLCDx

V14

Segment/Common 1/4 level voltage

1/4VLCDx

Segment/Common lowest level voltage

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