tza3012ahw NXP Semiconductors, tza3012ahw Datasheet - Page 23
tza3012ahw
Manufacturer Part Number
tza3012ahw
Description
30 Mbits/s Up To 3.2 Gbits/s A-ratetm Fibre Optic Receiver
Manufacturer
NXP Semiconductors
Datasheet
1.TZA3012AHW.pdf
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Philips Semiconductors
I
Addressing
Before any data is transmitted on the I
sent after the start condition.
The master transmitter/receiver either reads from the read-registers or writes to the write-registers. It is not possible to
read from and write to the same register. Figure 17 shows how the slave and register address bytes are defined.
Read/Write protocols
The protocol for writing to a single register is shown in Fig.18. The transmitter sends the address of the slave device,
waits for an acknowledge from the slave, sends register address, waits for an acknowledge from the slave, sends data
byte, waits for an acknowledge from the slave, followed by a stop condition.
The protocol for reading one or more registers is shown in Fig.19. The receiver sends the address of the slave device,
waits for an acknowledge from the slave, receives data byte(s) from the slave (the TZA3012AHW starts sending data
after asserting an acknowledge), after receiving the data, the receiver sends an acknowledge or, if finished, a
not-acknowledge, followed by a stop condition.
2003 May 21
2
handbook, full pagewidth
handbook, full pagewidth
C-BUS PROTOCOL
30 Mbits/s up to 3.2 Gbits/s
A-rate
fibre optic receiver
MSB
S
Slave address
ADDRESS
SLAVE
2
C-bus, the device which should respond is addressed first. The address byte is
Fig.17 Slave and register addresses.
acknowledge
from slave
R/W
0
A 1
MSB
Fig.18 Write protocol.
R/W
LSB
REGISTER
ADDRESS
23
MSB
1
acknowledge
from slave
A
MSB
one byte transferred
Register address
DATA
acknowledge
LSB
from slave
A
MDB386
P
MDB070
TZA3012AHW
LSB
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