PCD8544 datasheet(5/32 Pages) PHILIPS

5 / 32 page

1999 Apr 12

Philips Semiconductors

Product speciﬁcation

× 84 pixels matrix LCD controller/driver

PCD8544

PINNING

Note

1. For further details, see Fig.18 and Table 7.

6.1

Pin functions

6.1.1

R0 TO R47 ROW DRIVER OUTPUTS

These pads output the row signals.

6.1.2

C0 TO C83 COLUMN DRIVER OUTPUTS

These pads output the column signals.

6.1.3

VSS1,VSS2: NEGATIVE POWER SUPPLY RAILS

Supply rails VSS1 and VSS2 must be connected together.

6.1.4

VDD1,VDD2: POSITIVE POWER SUPPLY RAILS

Supply rails VDD1 and VDD2 must be connected together.

SYMBOL

DESCRIPTION

R0 to R47

LCD row driver outputs

C0 to C83

LCD column driver outputs

VSS1,VSS2

ground

VDD1,VDD2

supply voltage

VLCD1,VLCD2

LCD supply voltage

test 1 input

test 2 output

test 3 input/output

test 4 input

SDIN

serial data input

SCLK

serial clock input

D/C

data/command

SCE

chip enable

OSC

oscillator

RES

external reset input

dummy1, 2, 3, 4 not connected

6.1.5

VLCD1,VLCD2: LCD POWER SUPPLY

Positive power supply for the liquid crystal display. Supply

rails VLCD1 and VLCD2 must be connected together.

6.1.6

T1, T2, T3 AND T4: TEST PADS

T1, T3 and T4 must be connected to VSS, T2 is to be left

open. Not accessible to user.

6.1.7

SDIN: SERIAL DATA LINE

Input for the data line.

6.1.8

SCLK: SERIAL CLOCK LINE

Input for the clock signal: 0.0 to 4.0 Mbits/s.

6.1.9

D/C: MODE SELECT

Input to select either command/address or data input.

6.1.10

SCE: CHIP ENABLE

The enable pin allows data to be clocked in. The signal is

active LOW.

6.1.11

OSC: OSCILLATOR

When the on-chip oscillator is used, this input must be

connected to VDD. An external clock signal, if used, is

connected to this input. If the oscillator and external clock

are both inhibited by connecting the OSC pin to VSS, the

display is not clocked and may be left in a DC state.

To avoid this, the chip should always be put into

Power-down mode before stopping the clock.

6.1.12

RES: RESET

This signal will reset the device and must be applied to

properly initialize the chip. The signal is active LOW.

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