¡ Semiconductor
ML9041
LCD Display Circuit (COM1 to COM17, SEG1 to SEG100, SSR and CSR)
The ML9041 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
Transfer direction
SEG1 Æ SEG100
L
H
SEG100 Æ SEG1
CSR duty
AS bit
Shift direction
arbitrator's common pin
L
L
1/9
1/9
L
H
L
COM1 Æ COM9
COM2 Æ COM9, COM1
COM1 Æ COM12
COM9
COM1
COM12
COM1
COM17
COM1
COM1
COM9
COM1
COM12
COM1
COM17
L
1/12
1/12
1/17
1/17
1/9
L
H
L
COM2 Æ COM12, COM1
COM1 Æ COM17
L
L
H
L
COM2 Æ COM17, COM1
COM9 Æ COM1
H
H
H
H
H
H
1/9
H
L
COM8 Æ COM1, COM9
COM12 Æ COM1
1/12
1/12
1/17
1/17
H
L
COM11
COM17 Æ COM1
COM16 COM1, COM17
Æ COM1, COM12
H
Æ
* 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.
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