PEDL9041A-02
OKI Semiconductor
ML9041A-xxA/xxB
LCD Display Circuit (COM1 to COM17, SEG1 to SEG100, SSR and CSR)
The ML9041A has 17 common signal outputs and 100 segment signal outputs to display 20 characters (in the 1-
line display mode) or 40 characters (in the 2-line display mode).
The character pattern is converted into serial data and transferred in series through the shift register.
The transfer direction of serial data is determined by the SSR pin. The shift direction of common signals is
determined by the CSR pin. The following tables show the transfer and shift directions:
SSR
L
Transfer direction
→
SEG1
SEG100
→
H
SEG100
SEG1
CSR
L
duty
1/9
AS bit
Shift Direction
Arbitrator’s common pin
COM9
→
→
L
H
L
COM1
COM1
COM1
COM1
COM1
COM1
COM9
COM9
COM12
COM12
COM17
COM17
COM9
COM9
L
1/9
COM1
→
L
1/12
1/12
1/17
1/17
1/9
COM12
COM12
COM17
COM17
COM1
COM12
COM1
→
→
→
L
H
L
L
COM17
COM1
L
H
L
→
H
H
H
H
H
H
COM1
→
1/9
H
L
COM1
COM9
→
1/12
1/12
1/17
1/17
COM1
COM1
COM1
COM1
COM1
→
H
L
COM12
COM1
→
→
H
COM17
* Refer to the Expansion Instruction Codes section about the AS bit.
Signals to be input to the SSR and CSR pins should be determined at power-on and be kept unchanged.
28/64
OKI [ OKI ELECTRONIC COMPONETS ]
