PCF8801 데이터 시트보기 (PDF) - Philips Electronics
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PCF8801 Datasheet PDF : 20 Pages
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Philips Semiconductors
LCD driver for 140 × 2 segments
Product specification
PCF8801
PINNING
SYMBOL
PAD
SIMPLIFIED
SYMBOL(1)
DESCRIPTION
VDD1 to VDD4
28, 27, 3, 4 VDD
Power supply for output drivers, backplane drivers and LCD
bias generator; 4 pads connected internally
VSS1 to VSS4
30, 29, 1, 2 VSS
Ground for output drivers, backplane drivers and LCD bias
generator; 4 pads connected internally
VDD5
VSS5
REXT
16
VDD
15
VSS
10
Power supply for remaining circuitry; connect externally to
VDD1 to VDD4
Ground for remaining circuitry; connect externally to
VSS1 to VSS4
Enable internal oscillator input; connected via an external
resistor
RESET
14
Reset input; active HIGH
T1 to T3
13, 17, 18
Test pads; must remain unconnected
COM1_1, COM1_2
31, 173 COM1
First pair of identical 3-level LCD backplane outputs; each
pad is located on opposite sides of the die
COM2_1, COM2_2
32, 174 COM2
Second pair of identical 3-level LCD backplane outputs;
each pad is located on opposite sides of the die
DIR
19
Data direction control input; its voltage level determines the
direction in which data is shifted
S1 to S140
33 to 172
LCD driver outputs
DI1, DI2
24, 7
DI
Data input; the status of DIR determines which pad is valid;
each pad is located on opposite sides of the die
DO1, DO2
23, 8
DO
Data outputs; both identical; both always valid; for cascade
use; each pad is located on opposite sides of the die
LDP1, LDP2
26, 5
LDPI, LDPO
Data load control input (LDPI) and output (LDPO) on rising
edge; the status of DIR determines which pad is valid; each
pad is located on opposite sides of the die
LDN1, LDN2
25, 6
LDNI, LDNO Data load control input (LDNI) and output (LDNO) on falling
edge; the status of DIR determines which pad is valid; each
pad is located on opposite sides of the die
CLK1, CLK2
22, 9
CLKI, CLKO
Data shift clock input (CLKI) and output (CLKO); the status
of DIR determines which pad is valid; for cascade use; each
pad is located on opposite sides of the die
OSC1, OSC2
21, 11
OSCI, OSCO LCD multiplexing clock input (OSCI) and output (OSCO);
the status of DIR determines which pad is valid; each pad is
located on opposite sides of the die
INT_OSCO1, INT_OSCO2 20, 12
INT_OSCO Internal oscillator outputs; both identical; each pad is
located on opposite sides of the die
Note
1. These symbols simplify descriptions in this data sheet where several pads have the same function and also indicate
the direction of data on pads which can be selected to be either an input or an output.
2000 Feb 04
4
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