PEDL9044-03
1
Semiconductor
ML9044-xxA/xxB
LCD Display Circuit (COM1 to COM17, SEG1 to SEG120, SSR and CSR)
The ML9044 has 17 common signal outputs and 120 segment signal outputs to display 24 characters (in the 1-line
display mode) or 48 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
SEG120
→
H
SEG120
SEG1
CSR
L
duty
1/9
AS bit
Shift Direction
Arbitrator’s common pin
COM9
→
L
H
L
COM1
COM9
→
L
1/9
COM2
COM9, COM1
COM1
→
L
1/12
1/12
1/17
1/17
1/9
COM1
COM12
COM12
COM1
→
L
H
L
COM2
COM12, COM1
→
L
COM1
COM17
COM17
COM1
→
L
H
L
COM2
COM17, COM1
→
H
H
H
H
H
H
COM9
COM1
COM1
→
1/9
H
L
COM8
COM1, COM9
COM9
→
1/12
1/12
1/17
1/17
COM12
COM1
COM1
→
H
L
COM11
COM1, COM12
COM12
COM1
→
COM17
COM1
→
H
COM16
COM1, COM17
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.
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