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參數(shù)資料
| 型號： | PCF8801U |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顯示驅動器 |
| 英文描述： | LCD driver for 140 x 2 segments |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, UUC174 |
| 封裝： | DIE |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 85K |
| 代理商： | PCF8801U |
2000 Feb 04
8
Philips Semiconductors
Product specification
LCD driver for 140
×
2 segments
PCF8801
Internal oscillator
The internal oscillator generates two identical LCD
multiplexing clock signals (INT_OSCO) having a minimum
frequency of 240 Hz at pads INT_OSCO1 and
INT_OSCO2. The internal oscillator is enabled by
connecting an external resistor between pad REXT
and V
DD
, and disabled (INT_OSCO = 0) by connecting
pad REXT to V
SS
. An external resistor value of 330 k
will
typically generate a frequency of 500 Hz.
For cascade applications, the first chip in the cascade
should have pad INT_OSCO connected to pad OSCI.
Each OSCI pad of all subsequent chips should be
connected to the OSCO pad of the previous chip (see
Fig.4). The signal applied to the OSCI pad must always be
a clock signal; applying a DC signal could damage the
LCD.
Power-on reset and external reset
At power-on, the PCF8801 resets to the following
conditions:
The shift register and the output register sets all bits to 0
The frame generator outputs (COMMON and M) are 0
The multiplexed outputs (S1 to S140) to the LCD pixels
are 0
The backplane driver outputs (COM1 and COM2) are 0
until the first falling edge of OSCI (see Fig.2).
A positive pulse on pad RESET (active HIGH) has the
same effect as the power-on reset. A HIGH-level on
pad RESET disables all clock inputs, the bias generator,
and the internal oscillator (INT_OSCO = 0). If the RESET
input is not used, it is advisable to connect its pad directly
to the adjacent pad V
SS5
. However, if the RESET input is
to be used in a chip-on-glass application, it is strongly
advised that the RESET input is connected in series with
an on-glass resistance to reduce its sensitivity to
ESD/EMC disturbances. The minimum value of resistance
recommended by the ITO is 8 k
.
Cascading
To reduce the length of routing required between
cascaded chips on-glass, all inputs/outputs for control
lines, clock signals and data are provided at both sides of
the narrow package. An example of cascading is shown in
Fig.4.
handbook, full pagewidth
DI
DO
DIR
DATA IN
REXT
Rext
330 k
VDD
VSS
VSS
CLKI
CLKO
LDPO
LDNO
OSCO
CLOCK
LDPI
LOAD
LDNI
VDD
VSS
OSCI
INT_OSCO
RESET
PCF8801
PCF8801
chip 1
chip 2
DI
DO
DIR
REXT
VSS
VSS
CLKI
CLKO
LDPO
LDNO
OSCO
LDPI
LDNI
VDD
OSCI
INT_OSCO
RESET
MGL918
Fig.4 Example of cascading.
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相關代理商/技術參數(shù) |
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| PCF8811 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80 x 128 pixels matrix LCD driver |
| PCF8811MU/2DA/1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80 x 128 pixels matrix LCD driver |
| PCF8811MU/2DA/1,02 | 制造商:NXP Semiconductors 功能描述:LCD DRVR 1.8V/2.5V Die Waffle 制造商:NXP Semiconductors 功能描述:PCF8811MU/UNCASED/WAFLM//2DA/1 - Gel-pak, waffle pack, wafer, diced wafer on film 制造商:NXP Semiconductors 功能描述:LCD DRVR 1.8V/2.5V Die Waffle Waffle 制造商:NXP Semiconductors 功能描述:IC LCD CTLR/DVR CMOS LP UNCASED 制造商:NXP Semiconductors 功能描述:80 x 128 Pixels Matrix LCD Driver |
| PCF8811U/2DA/1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80 x 128 pixels matrix LCD driver |
| PCF8811U/2DA/1，026 | 制造商:NXP Semiconductors 功能描述:PCF8811U/UNCASED/WAFLM//2DA/1 - Gel-pak, waffle pack, wafer, diced wafer on film 制造商:NXP Semiconductors 功能描述:IC MATRIX LCD DRIVER UNCASED |
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