PCF2113AU Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

PCF2113AU

LCD controllers/drivers

Philips Electronics 

Philips Semiconductors

LCD controllers/drivers

Product specification

PCF2113x

8 INSTRUCTIONS

Only two PCF2113x registers, the Instruction Register (IR)

and the Data Register (DR) can be directly controlled by

the microcontroller. Before internal operation, control

information is stored temporarily in these registers, to

allow interfacing to various types of microcontrollers which

operate at different speeds or to allow interface to

peripheral control ICs.

The instruction set for I2C-bus commands is given in

Table 4.

The PCF2113x operation is controlled by the instructions

shown in Table 5 together with their execution time.

Details are explained in subsequent sections.

Instructions are of 4 types, those that:

1. Designate PCF2113x functions such as display

format, data length, etcetera.

2. Set internal RAM addresses

3. Perform data transfer with internal RAM

4. Others.

In normal use, category 3 instructions are used most

frequently. However, automatic incrementing by 1

(or decrementing by 1) of internal RAM addresses after

each data write lessens the microcontroller program load.

The display shift in particular can be performed

concurrently with display data write, enabling the designer

to develop systems in minimum time with maximum

programming efficiency.

During internal operation, no instructions other than the

‘read busy flag’ and ‘read address’ instructions will be

executed. Because the busy flag is set to a logic 1 while an

instruction is being executed, check to ensure it is a logic 0

before sending the next instruction or wait for the

maximum instruction execution time, as given in Table 5.

An instruction sent while the busy flag is logic 1 will not be

executed.

Table 4 Instruction set for I2C-bus commands

CONTROL BYTE

COMMAND BYTE

I2C-BUS COMMANDS

Co RS 0 0 0 0 0 0 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 note 1

Note

1. R/W is set together with the slave address.

2001 Dec 19

23

Share Link: