PEDL87V21071-01
OKI Semiconductor
ML87V21071
4. I2C-Bus Interface
The IC incorporates an interface that conforms to the I2C-bus interface standards of Philips. This allows setting a
filter selection etc., by an external micro-computer etc.
The slave address is set to 10111XX0 to write to and 10111XX1 to read from the IC.
Here, XX is set by the user with external setting pins. Namely, the slave address 10111, SLA2, SLA1, W/R is
obtained by using SLA2 and SLA1.
Table F4 (1) Slave Address
SLA2
SLA1
Slave Address (Write)
Slave Address (Read)
0
0
1
1
0
1
0
1
B8h
BAh
BCh
BEh
B9h
BBh
BDh
BFh
•
I2C-bus format
Input format of the I2C-bus interface is shown below.
Write Format
[Continuous Write]
S
S
Slave Address W A(s) Sub Address A(s) Data 0 A(s)
Data n A/A(s) P
[Single Write]
Slave Address W A(s) Sub Address A(s) Data 0 A(s) P
from master to slave
from slave to master
Read Format
[Continuous Read]
S Slave Address W A(s) Sub Address A(s)Sr Slave Address R A(s) Data 0 A(m)
Data n A(m)
P
[Single Read]
S Slave Address W A(s) Sub Address A(s)Sr Slave Address R A(s) Data 0 A(m) P
from master to slave
from slave to master
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