PCF88331 datasheet(44/112 Pages) PHILIPS

44 / 112 page

2003 Feb 14

Philips Semiconductors

Objective speciﬁcation

STN RGB - 132

× 132 × 3 driver

PCF8833

6.2.28

IDLE MODE OFF

The Idle mode off (IDMOFF) command turns off the Idle mode and the PCF8833 is working in the 4 kbyte colour mode.

This command is similar to the Idle mode on command (IDMON); see Section 6.2.29.

Table 42 Idle mode off register bits

6.2.29

IDLE MODE ON

The Idle mode on (IDMON) command activates the Idle mode of the LCD driver in order to reduce the power

consumption. When the Idle mode is switched on, the number of colours is reduced to 8 (only the MSB of data stored in

the RAM is used). In addition to the reduction in the number of colours, the frame frequency can also be reduced. The

frame frequency for the Idle mode can be programmed separately from the frame frequency in 4 kbyte colour mode; see

Section 6.2.41.

Table 43 Idle mode on register bits

6.2.30

COLOUR INTERFACE PIXEL FORMAT

By using the Colour interface pixel format command (COLMOD) different interface RGB formats can be chosen. The

choice of an RGB format also influences the way display data is transferred to the display data RAM via the interface;

see Section 7.1.3.

The different interface RGB formats are given in Table 45.

Table 44 Colour interface pixel format register bits; note 1

Note

1. X = don’t care.

D/C

76543210

DEFAULT

000111000

38H

D/C

76543210

DEFAULT

000111001

39H

D/C

76543210

DEFAULT

000111010

3AH

XXXXX

03H

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