PCF8536AT datasheet(7/54 Pages) NXP

7 / 54 page

PCA85276

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Product data sheet

Rev. 3 — 12 November 2018

7 of 54

NXP Semiconductors

PCA85276

Automotive 40 x 4 LCD driver

6.1.4 Command: bank-select

The bank-select command controls where data is written to RAM and where it is displayed

from.

[1]

The bank-select command has no effect in 1:3 and 1:4 multiplex drive modes.

6.1.5 Command: blink-select

The blink-select command allows configuring the blink mode and the blink frequency.

[1]

Normal blinking is assumed when the LCD multiplex drive modes 1:3 or 1:4 are selected.

[2]

Alternate RAM bank blinking does not apply in 1:3 and 1:4 multiplex drive modes.

6.1.5.1

Blinking

The display blinking capabilities of the PCA85276 are very versatile. The whole display

can blink at frequencies selected by the blink-select command (see Table 10). The blink

frequencies are derived from the clock frequency. The ratio between the clock and blink

frequencies depends on the blink mode selected (see Table 11).

Table 9.

Bank-select command bit description

See Section 6.3.5.

Bit

Symbol

Value

Description

Static

1:2 multiplex[1]

0, 1

see Table 5

6 to 2

11110

fixed value

input bank selection; storage of arriving display data

RAM row 0

RAM rows 0 and 1

RAM row 2

RAM rows 2 and 3

output bank selection; retrieval of LCD display data

RAM row 0

RAM rows 0 and 1

RAM row 2

RAM rows 2 and 3

Table 10.

Blink-select command bit description

See Section 6.1.5.1.

Bit

Symbol

Value

Description

0, 1see Table 5

6 to 3

1110

fixed value

2AB

blink mode selection

normal blinking[1]

alternate RAM bank blinking[2]

1 to 0

BF[1:0]

blink frequency selection

off

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