BU92747XXX Datasheet, PDF (25/46 Pages) Rohm – IrDA Controller LSI built-in Ir remote control

BD92747XXX
Datasheet
REGISTER WRITING PROTOCOL
The following sentence is about writing protocol. After transmitting the slave address and WRITE command (first
byte), the register address of BU92747XXX is transferred (second byte). The third byte is the register data of this
register address (second byte). After the register data (third byte), it is possible to send the register data
consecutively. The address is automatically increased. But the next register address becomes 00h when the
register address becomes final address (3Fh). After finishing the transmission, the register address is increased.
S 1 1 1 0 1 1 1 0 A A7 A6 A5 A4 A3 A2 A1 A0 A D7 D6 D5 D4 D3 D2 D1 D0 A _…D7 D6 D5 D4 D3 D2 D1D0 A P
Slave address
Register address
R/W=0 (WRITE)
Data
Register address increment
Data
Register address increment
from master to slave
from slave to master
A=acknowledge
A=not acknowledge
S=START condition
P=STOP condition
REGISTER READING PROTOCOL
After the slave address and R/W bit are written, register data is read from the fllowing byte. This data is the register data of
the address which is followed the last access address. Subsequently , the register data of the increased address is read.
But the following register address becomes 00h when the register address becomes final address. After the transmission is
finished, the register address is incresed.
S 1 1 1 0 1 1 1 1 A D7 D6 D5 D4 D3 D2 D1 D0 A _{………}D7 D6 D5 D4 D3 D2 D1 D0 A P
Slave address
Data
R/W=1 (READ)
Register address increment
from master to slave
from slave to master
A=acknowledge
A=not acknowledge
S=START condition
P=STOP condition
Data
Register address increment
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TSZ22111・15・001
25/25
TSZ02201-0E4E0F100020-1-2
24. June. 2015 Rev.001