tza3015hw NXP Semiconductors, tza3015hw Datasheet - Page 31

• Manufacturer Part Number: tza3015hw
• Description: 30 Mbit/s To 3.2 Gbit/s A-rate 4-bit Fibre Optic Transceiver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
I
Figure 24 shows the definition of the bytes. If bit R/W = 1
the master reads from the read register, if bit R/W = 0 the
master writes to the write register. It is not possible to write
and read the same register.
W
Figure 25 shows the protocol for writing to one single
register. After the start command (S) the transmitter sends
the address of the slave device, waits for an acknowledge
from the slave, sends the register address, waits for an
acknowledge, sends data, waits for an acknowledge from
the master followed by a stop condition (P).
2003 Dec 16
2
handbook, full pagewidth
handbook, full pagewidth
C-bus protocol
RITE PROTOCOL
30 Mbit/s to 3.2 Gbit/s A-rate
4-bit fibre optic transceiver
(1) The master receiver must signal an end of data to the slave transmitter by not generating an acknowledge on the last byte that has been clocked
Fig.24 Definition of slave- and register address (= instruction byte); slave and register addresses are 7 bits.
out of the slave.
MSB
S
Slave address
ADDRESS
handbook, halfpage
SLAVE
S
acknowledge
ADDRESS
from slave
R/W
SLAVE
0
A 1
MSB
Fig.25 Write protocol.
Fig.26 Read protocol.
acknowledge
R/W
LSB
R/W
from slave
REGISTER
1
ADDRESS
A
31
MSB
R
Figure 26 shows the protocol for reading from one or more
registers.
After the start command (S) the receiver sends the
address of the slave device, waits for an acknowledge
from the transmitter slave, receives data from the slave
(slave, TZA3015HW, starts sending data after generating
the acknowledge), after receiving the data, the receiver
(master) sends an acknowledge, or if finished a
not-acknowledge followed by a stop condition (P).
MSB
EAD PROTOCOL
1
acknowledge
from slave
DATA
n bytes
A
MSB
one byte transferred
from master
acknowledge
LSB
Register address
DATA
A/A
MDB072
P
(1)
acknowledge
from master
LSB
A
MDB071
P
MCE425
Preliminary specification
LSB
TZA3015HW