EM62100AGH datasheet(45/60 Pages) EMC

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EM62100

65 COM/132 SEG STN LCD Driver

Product Specification (V1.1) 09.13.2005

•••• 39

(This specification is subject to change without further notice)

7.2.22 Test Command

This is the dedicated IC chip test command. It must not be used during operation. It

can be cleared by applying an “L” signal to set the RESB input or issue the reset

command to release the test mode.

RDB

WRB

Hex

F0H to FFH

7.2.23 Oscillation Frequency Select

This command is to select the oscillation frequency of the driver IC as shown below.

RDB

WRB

D7 D6 D5 D4 D3 D2 D1 D0 Hex Oscillation Frequency

E4H

Typical 31.4kHz

E5H

Typical 26.3kHz

7.2.24 Partial Display Mode Set

This command is to select the display mode. When D0 is “L”, the IC is in normal display

mode, the maximum display duty ratio is determined by the pin connection of DUTY0

and DUTY1 and the command LCD Bias Set determines the LCD bias ratio. The IC

enters into partial display mode when D0 is high, then the commands Partial Display

Duty Set and Partial Display Bias Set determine the LCD display duty and bias ratios.

RDB

WRB D7 D6 D5 D4 D3 D2 D1 D0 Hex

Display Mode

82H

Normal Display

83H

Partial Display

7.2.25 Partial Display Duty and Bias Set

These two commands set the LCD display duty and bias ratios when the IC is in partial

display mode. Such commands are invalid when the IC is in normal display mode.

When the partial display duty is set, the LCD bias for partial display is also set

concurrently. The partial display duty will be kept at maximum duty (determine by pins

DUTY0 and DUTY1) when the duty set is larger than the maximum duty.

RS RDB WRB D7 D6 D5 D4 D3 D2 D1 D0

Hex

Partial Duty Scanning Line

30H

1/9 duty

Line[0:7], COMS

31H

1/17 duty Line[0:15], COMS

32H

1/33 duty Line[0:31], COMS

33H

1/49 duty Line[0:47], COMS

34H

1/65 duty Line[0:63], COMS

35H

1/55 duty Line[0:53], COMS

* 36H/37H Reserved

No effect

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