参数资料
型号: PCF8566T/1,118
厂商: NXP Semiconductors
文件页数: 7/48页
文件大小: 0K
描述: IC LCD DVR UNVRSL LOW-MUX 40VSOP
产品培训模块: LCD Driver
I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 1
显示器类型: LCD
配置: 7 段 + DP,14 段(24 段)
接口: I²C
电流 - 电源: 30µA
电源电压: 2.5 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 40-BSOP(0.295",7.50mm 宽)
供应商设备封装: 40-VSOP
包装: 标准包装
产品目录页面: 844 (CN2011-ZH PDF)
其它名称: 568-1070-6
NXP Semiconductors
V DD
PCF8566
Universal LCD driver for low multiplex rates
R ≤
t rise
2 C bus
V DD
V LCD
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
SDA
SCL
OSC
1
2
6
5
12
PCF8566
17 to 40
13 to 16
24 segment drives
4 backplanes
LCD PANEL
(up to 96
elements)
7
8
9
10
11
A0
A1
A2
SA0 V SS
mgg385
V SS
Fig 4. Typical system con?guration
7.1 Power-on reset
At power-on the PCF8566 resets to the following starting conditions:
?
?
?
?
?
?
?
All backplane outputs are set to V DD
All segment outputs are set to V DD
Drive mode 1:4 multiplex with 1 ? 3 bias is selected
Blinking is switched off
Input and output bank selectors are reset (as de?ned in Table 8 )
The I 2 C-bus interface is initialized
The data pointer and the subaddress counter are cleared
Do not transfer data on the I 2 C-bus after a power-on for at least 1 ms to allow the reset
action to complete.
7.2 LCD bias generator
The full-scale LCD voltage (V oper ) is obtained from V DD ? V LCD . The LCD voltage may be
temperature compensated externally through the V LCD supply to pin 12.
Fractional LCD biasing voltages are obtained from an internal voltage divider comprising
three series resistors connected between V DD and V LCD . The center resistor can be
switched out of the circuit to provide a 1 ? 2 bias voltage level for the 1:2 multiplex
con?guration.
7.3 LCD voltage selector
The LCD voltage selector coordinates the multiplexing of the LCD in accordance with the
selected LCD drive con?guration. The operation of the voltage selector is controlled by
mode-set commands from the command decoder. The biasing con?gurations that apply to
the preferred modes of operation, together with the biasing characteristics as functions of
V LCD and the resulting discrimination ratios (D), are given in Table 5 .
PCF8566_7
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 — 25 February 2009
7 of 48
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