PCF8536AT datasheet(11/54 Pages) NXP

11 / 54 page

PCA8576F

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Product data sheet

Rev. 3 — 3 December 2014

11 of 54

NXP Semiconductors

PCA8576F

Automotive 40 × 4 LCD driver

When display data is transmitted to the PCA8576F, the received display bytes are stored

in the display RAM in accordance with the selected LCD drive mode. The data is stored as

it arrives and depending on the current multiplex drive mode the bits are stored singularly,

in pairs, triples, or quadruples. To illustrate the filling order, an example of a 7-segment

display showing all drive modes is given in Figure 5; the RAM filling organization depicted

applies equally to other LCD types, see Section 7.3.1 to Section 7.3.4.

7.3.1 RAM filling in static drive mode

In the static drive mode the eight transmitted data bits are placed in eight successive

display RAM columns in row 0 (see Figure 6).

7.3.2 RAM filling in 1:2 multiplex drive mode

In the 1:2 multiplex drive mode the eight transmitted data bits are placed in four

successive display RAM columns of two rows (see Figure 7).

Fig 6.

Display RAM filling order in static drive mode

Fig 7.

Display RAM filling order in 1:2 multiplex drive mode

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