PCF85134HL-1 NXP [NXP Semiconductors], PCF85134HL-1 Datasheet - Page 22

• Manufacturer Part Number: PCF85134HL-1
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF85134_1
Product data sheet
8.1.4 I
8.1.5 Input filters
8.2 I
The PCF85134 acts as an I
transmit data to an I
the acknowledge signals of the selected devices. Device selection depends on the
I
In single device applications, the hardware subaddress inputs A0, A1, and A2 are
normally tied to V
applications A0, A1, and A2 are tied to V
no two devices with a common I
subaddress.
To enhance noise immunity in electrically adverse environments, RC low-pass filters are
provided on the SDA and SCL lines.
Two I
The least significant bit of the slave address is bit R/W. The PCF85134 is a write-only
device. It will not respond to a read access, so this bit should always be logic 0. The
second bit of the slave address is defined by the level tied at input SA0. Two displays
controlled by PCF85134 can be recognized on the same I
The I
condition (S) from the I
slave addresses. All PCF85134s with the same SA0 level acknowledge in parallel to the
slave address. All PCF85134s with the alternative SA0 level ignore the whole I
transfer.
2
2
2
C-bus slave address, the transferred command data and the hardware subaddress.
•
•
C-bus controller
C-bus protocol
Up to 16 PCF85134s on the same I
The use of two types of LCD multiplex drive mode on the same I
2
2
C-bus protocol is shown in
C-bus slave addresses (0111 000 and 0111 001) are reserved for the PCF85134.
SS
2
which defines the hardware subaddress 0. In multiple device
C-bus master receiver. The only data output from the PCF85134 are
Rev. 01 — 17 December 2009
2
C-bus master which is followed by one of the available PCF85134
2
C-bus slave receiver. It does not initiate I
2
C-bus slave address have the same hardware
Figure
2
15. The sequence is initiated with a START
C-bus for very large LCD applications
SS
Universal LCD driver for low multiplex rates
or V
DD
using a binary coding scheme, so that
2
C-bus which allows:
PCF85134
2
2
C-bus
C-bus transfers or
© NXP B.V. 2009. All rights reserved.
2
C-bus
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