PCF8545ATT datasheet(16/54 Pages) NXP

16 / 54 page

PCA8576F

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Product data sheet

Rev. 3 — 3 December 2014

16 of 54

NXP Semiconductors

PCA8576F

Automotive 40 × 4 LCD driver

Table 10). The input bank selector functions independently to the output bank selector.

7.4 Initialization

At power-on the status of the I2C-bus and the registers of the PCA8576F is undefined.

Therefore the PCA8576F should be initialized as quickly as possible after power-on to

ensure a proper bus communication and to avoid display artifacts. The following

instructions should be accomplished for initialization:

• I2C-bus initialization. For information about the I2C-bus, see Section 8.

– generating a START condition

– sending 0h and ignoring the acknowledge

– generating a STOP condition

• Mode-set command (see Table 7), setting

– bit E = 0

– bit B to the required LCD bias configuration

– bits M[1:0] to the required LCD drive mode

• Load-data-pointer command (see Table 8), setting

– bits P[5:0] to 0h (or any other required address)

• Device-select command (see Table 9), setting

– bits A[1:0] to the required hardware subaddress (for example, 0h)

• Bank-select command (see Table 10), setting

– bit I to 0

– bit O to 0

• Blink-select command (see Table 11), setting

– bit AB to 0 or 1

– bits BF[1:0] to 00 (or to a desired blinking mode)

• writing meaningful information (for example, a logo) into the display RAM

After the initialization, the display can be switched on by setting bit E = 1 with the

mode-set command.

7.5 Possible display configurations

The possible display configurations of the PCA8576F depend on the number of active

backplane outputs required. A selection of display configurations is shown in Table 15. All

of these configurations can be implemented in the typical system shown in Figure 13.

PCF8545ATT Datasheet(PDF) 16 Page - NXP Semiconductors