MSM6555B Просмотр технического описания (PDF) - Oki Electric Industry
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MSM6555B
Oki Electric Industry
MSM6555B Datasheet PDF : 27 Pages
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MSM6555B-xx
• 9D/17D (1/9Duty/1/17Duty)
This is a duty setting pin where "H" is defined as 1/9 duty and "L" as 1/17 duty. Select the level
in conformity to the panel used.
In the case of 1/17 duty, the Common outputs C10 to C16 must be kept open.
• 32K/EXT (32K x’tal osc/External clock)
This is an input pin used to set up the type of logic source oscillation.
32K/EXT = "H" : In this setting, 32.768 kHz is used for source oscillation frequency. The
oscillation feedback resistor (approx. 4 MW) is formed in the IC, and the external 32.768 kHz
crystal and oscillating capacitors are connected to the XT and XT, thereby forming the
oscillator circuit. When the source oscillation clock is input from outside, it is put into the XT,
and XT is kept open.
32K/EXT = "L" : This is used to input the source oscillation clock of about n-th power (n=1 to
4) of 2 of 32kHz.
Conforming to the command SF setting, the external source oscillation frequency is divided
into 1/2 to 1/16 in the IC and is used as source oscillation frequency in the IC. The XT is kept
open. Æ See SF command.
• TEST
This is a pin used for test in our company. This pin is kept open for the user.
• XT, XT
These are pins for 32.768 kHz crystal-controlled oscillator circuit formation and external
source oscillation input. XT is kept open, when the souce oscillation clock is input from
outside.
• C1 to C17, S1 to S80 (COMMON 1 to 17, SEGMENT 1 to 80)
These are output pins connected to the LCD panel. Alternation is provided by reserving the
frame. During the 1/9 duty operation, C1 to C9 are used with C10 to C17 kept open.
Æ See "Relation between Display Screen and Common and Segment Outputs".
• VC1, VCC1
These are pins to connect the capacitor to double the battery voltage. They are connected with
the capacitor of 0.1 mF.
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