STM32L152RB(2013) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM32L152RB
(Rev.:2013)

Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

STMicroelectronics 

STM32L151x6/8/B, STM32L152x6/8/B

Electrical characteristics

6.3.20

LCD controller (STM32L152xx only)

The STM32L152xx embeds a built-in step-up converter to provide a constant LCD reference

voltage independently from the VDD voltage. An external capacitor Cext must be connected

to the VLCD pin to decouple this converter.

Table 61. LCD controller 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

2.73

VLCD2 LCD internal reference voltage 2

2.86

VLCD3 LCD internal reference voltage 3

2.98

V

VLCD4 LCD internal reference voltage 4

3.12

VLCD5 LCD internal reference voltage 5

3.26

VLCD6 LCD internal reference voltage 6

3.4

VLCD7 LCD internal reference voltage 7

3.55

Cext

VLCD external capacitance

0.1

2

µF

ILCD(1)

RHtot(2)

RL(2)

Supply current at VDD = 2.2 V

Supply current at VDD = 3.0 V

Low drive resistive network overall value

High drive resistive network total value

3.3

3.1

5.28

6.6

192

240

µA

7.92

MΩ

288

kΩ

V44

Segment/Common highest level voltage

VLCD

V

V34

Segment/Common 3/4 level voltage

3/4 VLCD

V23

Segment/Common 2/3 level voltage

2/3 VLCD

V12

Segment/Common 1/2 level voltage

V13

Segment/Common 1/3 level voltage

1/2 VLCD

V

1/3 VLCD

V14

Segment/Common 1/4 level voltage

1/4 VLCD

V0

Segment/Common lowest level voltage

0

ΔVxx(3)

Segment/Common level voltage error

TA = -40 to 85 °C

± 50

mV

1. LCD enabled with 3 V internal step-up active, 1/8 duty, 1/4 bias, division ratio= 64, all pixels active, no LCD

connected

2. Guaranteed by design, not tested in production.

3. Based on characterization, not tested in production.

Doc ID 17659 Rev 8

101/121

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