參數(shù)資料
型號(hào)： PCF8578
廠商： NXP Semiconductors N.V.
英文描述： LCD row/column driver for dot matrix graphic displays
中文描述： 液晶行/列驅(qū)動(dòng)點(diǎn)陣圖形顯示
文件頁(yè)數(shù)： 8/44頁(yè)
文件大?。?/td> 323K
代理商： PCF8578
1998 Sep 08
8
Philips Semiconductors
Product specification
LCD row/column driver for dot matrix
graphic displays
PCF8578
7
FUNCTIONAL DESCRIPTION
The PCF8578 row/column driver is designed for use in one
of three ways:
Stand-alone row/column driver for small displays
(mixed mode)
Row/column driver with cascaded PCF8579s
(mixed mode)
Row driver with cascaded PCF8579s (mixed mode).
7.1
Mixed mode
In mixed mode, the device functions as both a row and
column driver. It can be used in small stand-alone
applications, or for larger displays with up to 15 PCF8579s
(31 PCF8579s when two slave addresses are used).
See Table 1 for common display configurations.
7.2
Row mode
In row mode, the device functions as a row driver with up
to 32 row outputs and provides the clock and
synchronization signals for the PCF8579. Up to 16
PCF8579s can normally be cascaded (32 when two slave
addresses are used).
Timing signals are derived from the on-chip oscillator,
whose frequency is determined by the value of the resistor
connected between OSC and V
SS
.
Commands sent on the I
2
C-bus from the host
microcontroller set the mode (row or mixed), configuration
(multiplex rate and number of rows and columns) and
control the operation of the device. The device may have
one of two slave addresses. The only difference between
these slave addresses is the least significant bit, which is
set by the logic level applied to SA0. The PCF8578 and
PCF8579 also have subaddresses. The subaddress of the
PCF8578 is only defined in mixed mode and is fixed at 0.
The RAM may only be accessed in mixed mode and data
is loaded as described for the PCF8579.
Bias levels may be generated by an external potential
divider with appropriate decoupling capacitors. For large
displays, bias sources with high drive capability should be
used. A typical mixed mode system operating with up to
15 PCF8579s is shown in Fig.5 (a stand-alone system
would be identical but without the PCF8579s).
Table 1
Possible displays configurations
Notes
1.
2.
Using 15 PCF8579s.
Using 16 PCF8579s.
APPLICATION
MULTIPLEX
RATE
MIXED MODE
ROW MODE
TYPICAL APPLICATIONS
ROWS
COLUMNS
ROWS
8
×
4 4
(2)
16
×
2
(2)
24
(2)
24
(2)
COLUMNS
640
(2)
640
(2)
640
(2)
640
(2)
Stand alone
1 : 8
1 : 16
1 : 24
1 : 32
1 : 8
1 : 16
1 : 24
1 : 32
8
16
24
32
8
(1)
16
(1)
24
(1)
32
(1)
32
24
16
8
small digital or
alphanumerical displays
With PCF8579
632
(1)
624
(1)
616
(1)
608
(1)
alphanumeric displays and
dot matrix graphic displays
相關(guān)PDF資料
PDF描述
PCF8578H LCD row/column driver for dot matrix graphic displays
PCF8578U LCD row/column driver for dot matrix graphic displays
PCF8579 LCD column driver for dot matrix graphic displays
PCF8579U7 LCD column driver for dot matrix graphic displays
PCF8579H LCD column driver for dot matrix graphic displays
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF8578_03 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:LCD row/column driver for dot matrix graphic displays
PCF8578H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:LCD row/column driver for dot matrix graphic displays
PCF8578H/1 功能描述:LCD 驅(qū)動(dòng)器 LCD DRVR DOT MATRIX RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
PCF8578H/1,118 功能描述:LCD 驅(qū)動(dòng)器 DOT MATRIX LCD DRIV (R/COLM) RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
PCF8578H/1,157 功能描述:LCD 驅(qū)動(dòng)器 LCD DRVR DOT MATRIX RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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