PCF8820 datasheet(21/60 Pages) PHILIPS

21 / 60 page

2000 Dec 07

Philips Semiconductors

Product speciﬁcation

× 101 Grey-scale/ECB colour dot matrix

LCD driver

PCF8820

8.1

Description of the bit functions

Table 3

Instruction set bit functions

BIT

RESET

STATE

VALUE

FUNCTION

D7 to D0

−−

data to be written to DDRAM

TR7 to TR0

−−

read-out value of sensor temperature

H2 to H0

command page numbers

000

function and RAM

001

display setting

010

high voltage generator setting

011

grey-scale/colour

100

special features

data order when written to DDRAM

normal (see Fig.6)

swapped: DB7 <-> DB0, DB6 <-> DB1, etc.

operation mode

operating mode

Power-down mode; see Section 8.1.1

address mode

horizontal address mode: data is written to DDRAM (see Fig.10)

vertical address mode: data is written to DDRAM (see Fig.9)

Y4 to Y0

−

Y-address of the DDRAM points to the rows; the address range is from

0 to 16 (10H); see Section 8.1.3

X6 to X0

−

X-address of the DDRAM points to the columns; the address range is from

0 to 100 (64H)

D, E

display mode

display blank: using the value in grey-scale register 0

all display segments on: using the value in grey-scale register 3

normal mode: using the values of the four grey-scale registers appropriate to the

RAM data

inverse video: using the values in all four grey-scale registers as in normal mode

but with their values swapped (GS0 and GS3 values transposed, GS1 and GS2

values transposed)

horizontal address space mirroring; see Figs 7 and 8; see Table 10

disabled: data to DDRAM is written from left (X = 0) to right (X = 100)

enabled: data to DDRAM is written from right (X = 0) to left (X = 100)

vertical address space mirroring; see Table 10

disabled: normal display

enabled: data is immediately mirrored vertically on the LCD. The status of bit MY

takes effect when data is read from the DDRAM and when generating column

signals.

PCF8820 Datasheet(PDF) 21 Page - NXP Semiconductors

PCF8820 Datasheet(HTML) 21 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL