PCF2119VU/2 Просмотр технического описания (PDF) - NXP Semiconductors.

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производитель

PCF2119VU/2

LCD controllers/drivers

NXP Semiconductors. 

NXP Semiconductors

PCF2119x

LCD controllers/drivers

Remark: In direct mode, no external VLCD is possible.

The direct mode can be used to reduce the current consumption when the required output

voltage VLCDOUT is close to the VDD2 supply voltage. This can be the case in icon mode or

in MUX 1:9 (depending on LCD liquid properties).

10.2.3.4 Temp_ctl

Table 28. Temp_ctl bit description

Bit

Symbol

Value

RS

-

0

R/W -

0

7 to 2 -

0001 00

1 to 0 TC[1:0]

00 to 11

Description

see Table 10

temperature coefficient

The bit-field TC[1:0] selects the temperature coefficient for the internally generated

VLCDOUT (see Table 29).

Table 29.

TC[1:0]

00

10

01

11

TC[1:0] selection of VLCD temperature coefficient

Typical value Description

−0.16 %/K

VLCD temperature coefficient 0 (default value)

−0.18 %/K

VLCD temperature coefficient 1

−0.21 %/K

VLCD temperature coefficient 2

−0.24 %/K

VLCD temperature coefficient 3

10.2.3.5 HV_gen

Table 30. HV_gen bit description

Bit

Symbol

Value

RS

-

0

R/W -

0

7 to 2 -

0100 00

1 to 0 S[1:0]

00 to 11

Description

see Table 10

fixed value

voltage multiplier

A software configurable voltage multiplier is incorporated in the VLCD generator and can

be set via the HV_gen command. The voltage multiplier control can be used to reduce

current consumption by disconnecting internal voltage multiplier stages, depending on the

required VLCDOUT output voltage (see Table 31).

Table 31.

S[1:0]

00

01

10

11

Voltage multiplier control bits

Description

set VLCD generator stages to 1 (2 × voltage multiplier)

set VLCD generator stages to 2 (3 × voltage multiplier)

set VLCD generator stages to 3 (4 × voltage multiplier)

do not use

PCF2119X_5

Product data sheet

Rev. 05 — 13 August 2009

© NXP B.V. 2009. All rights reserved.

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