參數(shù)資料
型號(hào)： PCF85176T
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 顯示驅(qū)動(dòng)器
英文描述： Universal LCD driver for low multiplex rates
中文描述： LIQUID CRYSTAL DISPLAY DRIVER, PDSO56
封裝： 6.10 MM, PLASTIC, MO-153, SOT364-1, TSSOP-56
文件頁(yè)數(shù)： 21/47頁(yè)
文件大?。?/td> 405K
代理商： PCF85176T
PCF85176
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 27 June 2011
21 of 47
NXP Semiconductors
PCF85176
Universal LCD driver for low multiplex rates
7.10.5
Output bank selector
The output bank selector (see
Table 14
) selects one of the four rows per display RAM
address for transfer to the display register. The actual row selected depends on the
selected LCD drive mode in operation and on the instant in the multiplex sequence.
In 1:4 multiplex mode, all RAM addresses of row 0 are selected, these are followed by
the contents of row 1, 2, and then 3
In 1:3 multiplex mode, rows 0, 1, and 2 are selected sequentially
In 1:2 multiplex mode, rows 0 and 1 are selected
In static mode, row 0 is selected
The PCF85176 includes a RAM bank switching feature in the static and 1:2 multiplex drive
modes. In the static drive mode, the bank-select command may request the contents of
row 2 to be selected for display instead of the contents of row 0. In the 1:2 multiplex mode,
the contents of rows 2 and 3 may be selected instead of rows 0 and 1. This gives the
provision for preparing display information in an alternative bank and to be able to switch
to it once it is assembled.
7.10.6
Input bank selector
The input bank selector loads display data into the display data in accordance with the
selected LCD drive configuration. Display data can be loaded in row 2 in static drive mode
or in rows 2 and 3 in 1:2 multiplex drive mode by using the bank-select command (see
Table 14
). The input bank selector functions independently to the output bank selector.
7.11 Blinking
The display blinking capabilities of the PCF85176 are very versatile. The whole display
can blink at frequencies selected by the blink-select command (see
Table 15
). The blink
frequencies are derived from the clock frequency. The ratio between the clock and blink
frequencies depends on the blink mode selected (see
Table 8
).
An additional feature is for an arbitrary selection of LCD elements to blink. This applies to
the static and 1:2 multiplex drive modes and can be implemented without any
communication overheads. By means of the output bank selector, the displayed RAM
banks are exchanged with alternate RAM banks at the blink frequency. This mode can
also be specified by the blink-select command.
In the 1:3 and 1:4 multiplex modes, where no alternative RAM bank is available, groups of
LCD elements can blink by selectively changing the display RAM data at fixed time
intervals.
The entire display can blink at a frequency other than the nominal blink frequency. This
can be effectively performed by resetting and setting the display enable bit E at the
required rate using the mode-set command (see
Table 11
).
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PCF85176T/1,118 功能描述:LCD 驅(qū)動(dòng)器 40 SGMT 2640Hz 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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