PCF8536AT datasheet(26/54 Pages) NXP

26 / 54 page

PCA8576F

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Product data sheet

Rev. 3 — 3 December 2014

26 of 54

NXP Semiconductors

PCA8576F

Automotive 40 × 4 LCD driver

7.6.4 Backplane outputs

The LCD drive section includes four backplane outputs BP0 to BP3 which must be

connected directly to the LCD. The backplane output signals are generated in accordance

with the selected LCD drive mode. If less than four backplane outputs are required, the

unused outputs can be left open-circuit.

Table 17 describes which outputs are active for each of the multiplex drive modes and

what signal is generated.

[1]

These pins may optionally be connected to the display to improve drive strength. Connect only with the

corresponding output pin carrying the same signal. If not required, they can be left open-circuit.

7.6.5 Segment outputs

The LCD drive section includes 40 segment outputs S0 to S39 which should be

connected directly to the LCD. The segment output signals are generated in accordance

with the multiplexed backplane signals and with data residing in the display latch. When

less than 40 segment outputs are required, the unused segment outputs should be left

open-circuit.

Table 17.

Mapping of output pins and corresponding output signals with respect to the

multiplex driving mode

Multiplex drive

mode

Output pin

BP0

BP1

BP2

BP3

Signal

1:4

BP0

BP1

BP2

BP3

1:3

BP0

BP1

BP2

BP1[1]

1:2

BP0

BP1

BP0[1]

BP1[1]

static

BP0

BP0[1]

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