BD81026MUV Datasheet, PDF (9/22 Pages) Rohm – Gamma voltage generated IC with built-in DAC

BD81026MUV
■Command interface
Use I²C BUS for command interface with host. Writing or reading by specifying 1 byte select address, along with slave
address. I²C BUS Slave mode format is shown below.
MSB
LSB
MSB
LSB
MSB
LSB
S
Slave Address
A
Select Address
A
DATA
AP
S
Slave Address
A
Select Address
DATA
P
: START condition
: After slave address (7bit), send total 8bit data with either READ mode (H) or WRITE mode
(L). （MSB first）
: Acknowledge
Added acknowledge bit per byte in sending and receiving data.
If the data is sent/ received properly, “L” is send/ received.
Sending or Receiving ”H” means lack of acknowledge.
: Use 1 byte select address.
: Data byte. Sending/ Receiving data. （MSB first）
: STOP condition
The case where writing 3FCh to DAC1（Single mode）
S
Slave Address A Select Address A Register1 DATA0 A Register1 DATA1 A P
(EX.) E8h or EAh
01h
03h
FCh
: Slave from master
: Master from slave
The case where writing 3FCh from DAC0 to DAC3 (Multi mode)
S Slave Address A
Select
Address
A ^Register0 A ^Register0 A ^Register1 A
DATA0
DATA1
DATA0
(EX.)E8h or EAh
00h
03h
FCh
03h
Register1 to 3
DATA0,DATA1
AP
: Slave from master
: Master from slave
■Double Register switching function
When setting Low of MODE pin, it is able to switch BANK A or BANK B by changing High/Low of BKSEL pin.
During BKSEL=Low, connect BANK A to DAC.
During BKSEL=High, connect BANK B to DAC.
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TSZ22111・15・001
9/18
TSZ02201-0313AAF00660-1-2
19.Feb.2016 Rev.001