PCA2117DUGSSLASHDA datasheet(71/107 Pages) NXP

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PCA2117

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Product data sheet

Rev. 4 — 8 April 2015

71 of 107

NXP Semiconductors

PCA2117

Automotive LCD driver for character displays

[1]

Assuming that general-purpose RAM was already selected.

9.3 SPI interface

Data transfer to the device is made via a four-line SPI-bus (see Table 45). The SPI-bus is

initialized whenever the chip enable line pin CE is inactive.

[1]

The chip enable must not be wired permanently LOW.

3.2 Select decrement address pointer

I2C-RESTART

Slave address

SA0

R/W

Acknowledge from PCA2117

RS[1:0]

Acknowledge from PCA2117

Command: Entry_mode_set

Acknowledge from PCA2117

3.3 Select read RAM data

I2C-RESTART

Slave address

SA0

R/W

Acknowledge from PCA2117

RS[1:0]

Acknowledge from PCA2117

I2C-RESTART

Slave address

SA0

R/W

Acknowledge from PCA2117

Command: Read_data

reading 0 to n byte

Acknowledge from master after

each byte

I2C-STOP

Table 44.

Example: Reading from RAM by I2C-bus …continued

Bits labeled as - are ignored.

Commands and signals

Values

Table 45.

Serial interface

Symbol

Function

Description

chip enable input;

active LOW[1]

when HIGH, the interface is reset

SCL

serial clock input

input may be higher than VDD1

SDI/SDAIN serial data input

input may be higher than VDD1;

input data is sampled on the rising edge of SCL

SDO

serial data output

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