参数资料
型号: PCA8576CH/Q900/1,1
厂商: NXP Semiconductors
文件页数: 25/54页
文件大小: 0K
描述: IC LCD DRIVER 40SEG I2C 64LQFP
产品培训模块: I²C Bus Fundamentals
标准包装: 1
显示器类型: LCD
配置: 40 段
接口: I²C
电流 - 电源: 120µA
电源电压: 2 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 标准包装
其它名称: 568-5122-6
NXP Semiconductors
PCA8576C
Automotive LCD driver for low multiplex rates
Fig 17. Acknowledgement of the I 2 C-bus
7.16.5 PCA8576C I 2 C-bus controller
The PCA8576C acts as an I 2 C-bus slave receiver. It does not initiate I 2 C-bus transfers or
transmit data to an I 2 C-bus master receiver. The only data output from the PCA8576C are
the acknowledge signals of the selected devices. Device selection depends on the
I 2 C-bus slave address, the transferred command data and the hardware subaddress.
In single device application, the hardware subaddress inputs A0, A1, and A2 are normally
tied to V SS which defines the hardware subaddress 0. In multiple device applications
A0, A1, and A2 are tied to V SS or V DD using a binary coding scheme so that no two
devices with a common I 2 C-bus slave address have the same hardware subaddress.
In the power-saving mode it is possible that the PCA8576C is not able to keep up with the
highest transmission rates when large amounts of display data are transmitted. If this
situation occurs, the PCA8576C forces the SCL line LOW until its internal operations are
completed. This is known as the clock synchronization feature of the I 2 C-bus and serves
to slow down fast transmitters. Data loss does not occur.
7.16.6 Input filter
To enhance noise immunity in electrically adverse environments, RC low-pass filters are
provided on the SDA and SCL lines.
7.17 I 2 C-bus protocol
Two I 2 C-bus slave addresses (0111000 and 0111001) are reserved for the PCA8576C.
The least significant bit of the slave address that a PCA8576C responds to is defined by
the level tied at its input SA0. Therefore, two types of PCA8576C can be distinguished on
the same I 2 C-bus which allows:
? Up to 16 PCA8576Cs on the same I 2 C-bus for very large LCD applications.
? The use of two types of LCD multiplex on the same I 2 C-bus.
PCA8576C
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 December 2013
? NXP B.V. 2013. All rights reserved.
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