Silan

Semiconductors

SC16311

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2001.11.8.

10

(4) Display control command

10

-

b0

MSB

LSB

-

b3b2b1

Don't care

Sets dimming quantity.

000: Sets pulse width to 1/16.

001: Sets pulse width to 2/16.

010: Sets pulse width to 4/16.

011: Sets pulse width to 10/16.

100: Sets pulse width to 11/16.

101: Sets pulse width to 12/16.

110: Sets pulse width to 13/16.

111: Sets pulse width to 14/16.

Turns on/off display.

0: Display off(key scan continues*)

1: Display on

On power application, the 1/16-pulse width is set and the display is turned off.

*: On power application, key scanning is stopped.

Key Scanning and Display Timing

...

.........

TDISP

SEG Output DIG1 DIG2 DIG3

DIGn

DIG1

key scan data

G1

G2

G3

Gn

1frame =TDISP X (n+1)

1/16

TDISP

One cycle of key scanning consists of two frames, and data of 12 x 4 matrices is stored in RAM.