参数资料
型号: PCF85132U/2DA/1,02
厂商: NXP Semiconductors
文件页数: 31/62页
文件大小: 0K
描述: IC LCD DISPLAY DRVR UNCASED
标准包装: 600
显示器类型: LCD
配置: 多重
接口: I²C
数字或字符: 任何数字类型
电流 - 电源: 60µA
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 模具
供应商设备封装: 模具
包装: 散装
NXP Semiconductors
PCF85132
LCD driver for low multiplex rates
Having two reserved slave addresses allows the following on the same I 2 C-bus:
? Up to 8 PCF85132 on the same I 2 C-bus for very large LCD applications
? The use of two types of LCD multiplex drive modes on the same I 2 C-bus
The I 2 C-bus protocol is shown in Figure 21 . The sequence is initiated with a START
condition (S) from the I 2 C-bus master which is followed by one of two possible PCF85132
slave addresses available. All PCF85132 with the corresponding SA0 level acknowledge
in parallel to the slave address, but all PCF85132 with the alternative SA0 level ignore the
whole I 2 C-bus transfer.
R/W = 0
slave address
control byte
RAM/command byte
S
S 0 1 1 1 0 0 A 0 A
0
C R
O S
M
A S
B
L
S P
B
EXAMPLES
a) transmit two bytes of RAM data
S
S 0 1 1 1 0 0 A 0 A 0 1
A
RAM DATA
A
RAM DATA
A P
0
b) transmit two command bytes
S
S 0 1 1 1 0 0 A 0 A 1 0
A
COMMAND
A 0 0
A
COMMAND
A P
0
c) transmit one command byte and two RAM date bytes
S
S 0 1 1 1 0 0 A 0 A 1 0
A
COMMAND
A 0 1
A
RAM DATA
A
RAM DATA
A P
0
mgl752
Fig 21. I 2 C-bus protocol
After acknowledgement, a control byte follows which defines if the next byte is RAM or
command information.
Table 19.
Control byte description
Bit
7
6
5 to 0
Symbol
CO
RS
-
Value
0
1
0
1
-
Description
continue bit
last control byte
control bytes continue
register selection
command register
data register
not relevant
PCF85132
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 15 July 2013
? NXP B.V. 2013. All rights reserved.
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