MSM9000B-xx OKI electronic componets, MSM9000B-xx Datasheet - Page 12

• Manufacturer Part Number: MSM9000B-xx
• Description: DOT MATRIX LCD CONTROLLER
• Manufacturer: OKI electronic componets

¡ Semiconductor
• XT (Crystal)
• XT (Crystal)
• P/S (Parallel/Serial Select)
• 9D/16D (Duty Select)
• 32K/EXT (Clock Select)
• RESET (Reset)
• N1, N2 (Contrast Change)
Input pin for crystal oscillation. By connecting a 32.768-kHz crystal and capacitors to this pin
and the XT pin, a crystal oscillation circuit is formed. When an external clock is used, input
the clock to the XT pin.
Output pin for crystal oscillation. By connecting a 32.768-kHz crystal and capacitors to this
pin and the XT pin, a crystal oscillation circuit is formed. When the external clock is used,
leave this pin open.
Input pin to choose between the parallel interface and serial interface. To select the parallel
interface, make this pin low. To select the serial interface, make this pin high. After power
is turned on, do not change the setting of this pin.
Input pin to set a duty cycle. When this pin is set to "H", a duty cycle of 1/9 is selected.
When the pin is set to "L", a duty cycle of 1/16 is selected. Choose either according to the panel
to be used. When a duty cycle of 1/9 is chosen, leave common output pins COM10 to COM16
open.
Input pin to choose crystal oscillation mode or external clock input mode. Leave this pin at
a "L" level.
Reset signal input pin. Setting this pin to L results in the initial state. For modes and the
display after a reset input, see "Mode Settings after a Reset Input".
Input pins that determine the voltages of V
a command. The table below shows the relationships between pin states and contrast
adjustment ranges.
When forming a crystal oscillation circuit
XT
XT
32.768 kHz
Oscillation circuit diagram
18 pF
18 pF
SS2
and V
SS3
together with contrast adjustment by
When inputting an external clock
XT
XT
OPEN
MSM9000B-xx
External
clocks
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