點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

DM132

DM132

Version

：A.014

Page

：8

Typical Control Method

1) Command Sequence

To manipulate DM132, we should properly control the CMD, DIN, DCLK, and GCLK as

following steps:

1.

Issue command “Shift-in”, and then enter luminance data DIN. Note that DM132

starts to shift-in data at the DCLK rising edge next to the edge which latched

Shift-in

command.

2.

After data are completely entered, send command “Capture” to save data in

registers.

3.

Issue command “Emitting” or ”Disable”. Note that:

A. DM132 generates its output in one-shot fashion, i.e. the output after (1024) x

B. There are 3 GCLK latencies between the latched LED Emitting/Disable

command and PWM start/stop. This is shown in Figure 2.

4.

Repeat step 1~4. In the same frame, the luminance data doesn’t have to be

changed, just repeat step 3~4. Note that the second command “Emitting” will be

command is sent in advance.

The process discussed above could be summarized in the following table. At the

same time, DCLK and GCLK remain free running.

Table 1. Example of Command Sequence

Frame

N-1

Frame

N

Frame

N+1