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参数资料
| 型号： | PCF8534AU/DA/1,026 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 20/52页 |
| 文件大小： | 0K |
| 描述： | IC LCD DISPLAY DVR 60SEG |
| 标准包装： | 720 |
| 显示器类型： | LCD |
| 配置： | 60 段 |
| 接口： | I²C |
| 电流 - 电源： | 8µA |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 模具 |
| 供应商设备封装： | 模具 |
| 包装： | 托盘 - 晶粒 |
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NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
When display data is transmitted to the PCF8534A, the display bytes received are stored
in the display RAM in accordance with the selected LCD multiplex drive mode. The data is
stored as it arrives and depending on the current multiplex drive mode, data is stored
singularly, in pairs, triples, or quadruples. To illustrate the filling order, an example of a
7-segment display showing all drive modes is given in Figure 13 . The RAM filling
organization depicted applies equally to other LCD types.
? In static drive mode the eight transmitted data bits are placed into row 0 as one byte.
? In 1:2 multiplex drive mode the eight transmitted data bits are placed in pairs into
row 0 and row 1 as two successive 4-bit RAM words.
? In 1:3 multiplex drive mode the eight bits are placed in triples into row 0, row
1, and row 2 as three successive 3-bit RAM words, with bit 3 of the third address left
unchanged. It is not recommended to use this bit in a display because of the difficult
addressing. This last bit may, if necessary, be controlled by an additional transfer to
this address. But care should be taken to avoid overwriting adjacent data because
always full bytes are transmitted (see Section 7.10.3 ).
? In 1:4 multiplex drive mode, the eight transmitted data bits are placed in quadruples
into row 0, row 1, row 2, and row 3 as two successive 4-bit RAM words.
7.10.1 Data pointer
The addressing mechanism for the display RAM is realized using the data pointer. This
allows the loading of an individual display data byte, or a series of display data bytes, into
any location of the display RAM. The sequence commences with the initialization of the
data pointer by the load-data-pointer command (see Table 12 ). Following this command,
an arriving data byte is stored at the display RAM address indicated by the data pointer.
The filling order is shown in Figure 13 . After each byte is stored, the content of the data
pointer is automatically incremented by a value dependent on the selected LCD drive
mode:
?
?
?
?
In static drive mode by eight.
In 1:2 multiplex drive mode by four.
In 1:3 multiplex drive mode by three.
In 1:4 multiplex drive mode by two.
If an I 2 C-bus data access terminates early, then the state of the data pointer is unknown.
Consequently, the data pointer must be rewritten before further RAM accesses.
7.10.2 Subaddress counter
The storage of display data is determined by the content of the subaddress counter.
Storage is allowed only when the content of the subaddress counter matches with the
hardware subaddress applied to A0, A1, and A2. The subaddress counter value is defined
by the device-select command (see Table 13 ). If the content of the subaddress counter
and the hardware subaddress do not match, then data storage is inhibited but the data
pointer is incremented as if data storage had taken place. The subaddress counter is also
incremented when the data pointer overflows.
PCF8534A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 25 July 2011
? NXP B.V. 2011. All rights reserved.
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相关代理商/技术参数 |
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|---|---|
| PCF8534H | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Universal LCD driver for low multiplex rates |
| PCF8535 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:65 x 133 pixel matrix driver |
| PCF8535U | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:65 x 133 pixel matrix driver |
| PCF8536 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:I2C/SPI LCD and PWM LED controller for industrial and automotive applications |
| PCF85363ATL/AX | 功能描述:Real Time Clock (RTC) IC Clock/Calendar I2C, 2-Wire Serial 10-XFDFN Exposed Pad 制造商:nxp semiconductors 系列:- 包装:剪切带（CT） 零件状态:有效 类型:时钟/日历 特性:警报器，闰年，监视计时器 存储容量:- 时间格式:HH：MM：SS：hh（12/24 小时） 日期格式:YY-MM-DD-dd 接口:I2C，2 线串口 电压 - 电源:0.9 V ~ 5.5 V 电压 - 电源，电池:0.9 V ~ 5.5 V 电流 - 计时（最大）:0.885μA @ 3.3V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-XFDFN 裸露焊盘 供应商器件封装:10-DFN（2.6x2.6） 标准包装:1 |
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