PCF8562TT-2 NXP [NXP Semiconductors], PCF8562TT-2 Datasheet - Page 27

• Manufacturer Part Number: PCF8562TT-2
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8562
Product data sheet
8.5 I
8.6 Input filters
8.7 I
The PCF8562 acts as an I
transmit data to an I
the acknowledge signals of the selected devices. Device selection depends on the
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 that a PCF8562 will respond to is defined by
the level tied to its SA0 input. The PCF8562 is a write-only device and will not respond to
a read access.
The I
condition (S) from the I
slave addresses available. All PCF8562s whose SA0 inputs correspond to bit 0 of the
slave address respond by asserting an acknowledge in parallel. This I
ignored by all PCF8562s whose SA0 inputs are set to the alternative level.
After an acknowledgement, one or more command bytes follow, that define the status of
each addressed PCF8562.
The last command byte sent is identified by resetting its most significant bit, continuation
bit C, (see
PCF8562s on the bus.
2
2
2
Fig 17. I
Fig 18. Format of command byte
C-bus slave address, on the transferred command data and on the hardware
C-bus controller
C-bus protocol
2
2
C-bus protocol is shown in
C-bus slave addresses (0111 000 and 0111 001) are reserved for the PCF8562.
2
S
C-bus protocol
Figure
0 1 1 1 0 0
slave address
All information provided in this document is subject to legal disclaimers.
18). The command bytes are also acknowledged by all addressed
1 byte
2
C-bus master receiver. The only data output from the PCF8562 are
2
C-bus master which is followed by one of two possible PCF8562
Rev. 6 — 16 June 2011
2
S
A
0
C-bus slave receiver. It does not initiate I
R/W
MSB
0 A C
C
Figure
acknowledge
n ≥ 1 byte(s)
COMMAND
REST OF OPCODE
17. The sequence is initiated with a START
Universal LCD driver for low multiplex rates
A
msa833
DISPLAY DATA
n ≥ 0 byte(s)
LSB
update data pointers
acknowledge
2
C-bus transfers or
2
PCF8562
C-bus transfer is
© NXP B.V. 2011. All rights reserved.
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