ST7781 datasheet(71/88 Pages) SITRONIX

Part #	ST7781

Description	262K Color Single - Chip TFT Controller/Driver

PDF	88 Pages

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Manufacturer	SITRONIX [Sitronix Technology Co., Ltd.]

Direct Link	http://www.sitronix.com.tw

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71 / 88 page

ST7781

Ver. 1.7

13. FMARK Function

The ST7781 outputs an FMARK pulse when the ST7781 is driving the line specified by FMP[8:0] bits. The FMARK signal

can be used as a trigger signal to write display data in synchronization with display operation by detecting the address

where data is read out for display operation.

The FMARK output interval is set by FMI[2:0] bits. Set FMI[2:0] bits in accordance with display datarewrite cycle and data

transfer rate. Set FMARKOE = 1 when outputting FMARK pulse from the FMARK pin.

FMI[2:0]

Output Interval

000

1 Frame

001

2 Frame

011

4 Frame

101

6 Frame

Others

Setting Prohibited

Table 13.1: FMARK Interval

Table 13.2: FMARK Output Position

13.1 FMP Setting Example

Fig. 13.1.1 FMARK Setting Example

FMP[8:0]

FMARK Output Position

9’h000

0 th line

9’h001

1 st line

9’h002

2 nd line

9’h003

3 rd line

9’h174

372 th line

9’h175

373 th line

9’h176

374 th line

9’h177

375 th line

ST7781 Datasheet(PDF) 71 Page - Sitronix Technology Co., Ltd.

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