FEDL9092-01
OKI Semiconductor
ML9092-01/02/03/04
Serial Interface Operation
• Instruction code
A register that transfers display data, key scan data, etc. according to the content of the instruction code is selected
(see below).
D7
“1”
D6
“1”
D5
D4
D3
D2
D1
D0
R/W
Register number
(1) D7, D6 (fixed at “1”)
When selecting the start byte register, always write a “1” to bits D7 and D6.
(2) D5 (R/W) (Read mode/write mode select bit)
1: Read mode is selected
0: Write mode is selected
(3) D4 to D0 (Register number)
The correspondence between the start byte contents and the registers and display data RAM is shown in the table
below.
D7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D5
0
1
0
0
0
0
0
0
0
0
1
0
0
0
0
D4
1
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Register name
Key scan register
1/0
0
Display data RAM
X address register
Y address register
Port A register
0
0
0
Port B register
0
Port C register
0
Port D register
0
Control register1
Control register 2
Rotary encoder register
Contrast ADJ register
PWM0 register
0
0
0
0
0
PWM1 register
0
PWM2 register
38/66
OKI [ OKI ELECTRONIC COMPONETS ]
