PCF8537 datasheet(43/82 Pages) NXP

43 / 82 page

PCF8537

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Product data sheet

Rev. 1 — 31 May 2012

43 of 82

NXP Semiconductors

PCF8537

Industrial LCD driver for multiplex rates up to 1:8

8.5.1.5

Static drive mode

In the static drive mode, BP0 must be connected directly to the LCD.

In the static drive mode, the same signal is carried by all eight backplane outputs and they

can be connected in parallel for very high drive requirements.

• BP0 is repeated on BP1, BP2, BP3, BP4, BP5, BP6, and BP7

8.5.2 Segment outputs

The LCD drive section includes up to 46 segment outputs. Segments S0 to S43 are

always segment outputs. There are also two more segment outputs which become active

in 1:6 multiplex mode. These are S45/BP6 and S44/BP7 and must also be connected

directly to the display.

The segment output signals are generated based on the multiplexed backplane signals

and with data resident in the display register. When less than 46 segment outputs are

required, the unused segment outputs must be left open-circuit.

8.5.2.1

Static, 1:8, 1:4, 1:2 multiplex drive mode

In these drive modes, segments S0 to S43 must be connected to the display.

8.5.2.2

1:6 multiplex drive mode

In this drive mode, segments S0 to S43, S44, and S45 must be connected to the display.

PCF8537 Datasheet(PDF) 43 Page - NXP Semiconductors