PCF88331 datasheet(23/112 Pages) PHILIPS

23 / 112 page

2003 Feb 14

Philips Semiconductors

Objective speciﬁcation

STN RGB - 132

× 132 × 3 driver

PCF8833

6.2.11

NORMAL DISPLAY MODE ON

The normal Display mode on command (NORON) turns the display into Normal mode which is also the reset state.

An explanation of how the command NORON can be used is illustrated in Fig.6.

Table 20 Normal Display mode on register bits

6.2.12

DISPLAY INVERSION OFF

The Display inversion off command (INVOFF) turns the display into a non-inverted screen without modifying the display

data RAM. Display inversion off is the reset state of the PCF8833.

Table 21 Display inversion off register bits

6.2.13

DISPLAY INVERSION ON

The Display inversion on command (INVON) turns the display into an inverted screen without modifying the display data

RAM. The RAM data is read out and inverted while writing to the display.

The display Inversion mode can be switched off by sending the INVOFF command; see Section 6.2.12.

When sending INVON, in Partial mode only, the pixels of a partial area are inverted. INVON is overruled by DAL and

DALO. In Partial mode the pixels outside of the partial are always off.

Table 22 Display inversion on register bits

6.2.14

ALL PIXELS OFF

The All pixels off command (DALO) can be switched off by sending the normal display on command (NORON) (see

Section 6.2.11) or by sending the partial Display mode on command (PTLON); see Section 6.2.10. Furthermore DALO

is left with the command DAL; see Section 6.2.15. When DALO is active all pixels are driven, as if the display RAM was

filled with all zeros (off-state). DALO does not change the data stored in the display RAM. Figure 6 illustrates how DAL

(all pixels on) and DALO (all pixels off) can be used.

All pixels will be switched off regardless of the display data RAM.

Table 23 All pixels off register bits

D/C

D7D6D5D4D3D2D1D0

DEFAULT

000010011

13H

D/C

76543210

DEFAULT

000100000

20H

D/C

76543210

DEFAULT

000100001

21H

D/C

76543210

DEFAULT

000100010

22H

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