NT6861U View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT6861U

8-Bit Microcontroller for Monitor

Novatek Microelectronics 

NT6861

Sync. Mode

Processing

System Default:

S/C = '1' & HSEL = '1'

Open INTV & clear INTV flag

No

INTV ?

Yes

Delay 31 ms

Set S/C = '0'

Clear VCNTOV & HCNTOV

Open INTV & clear INTV flag

Delay 60ms

Yes

VCNTOV = '1'

?

No

STAND-BY Mode

Yes

HCNTH = '00'

?

NORMAL Mode

No

Seperate Sync.

Read VCNT|HCNT

Counter Register

Yes

VCNTOV = '1'

?

No

Yes

HCNTH ='00'

?

No

Read VCNT|HCNT

Counter Register

Freq.

Calculating

NORMAL Mode

Composite Sync.

Set S/C = '1' & HSEL = '0'

Clear VCNTOV & HCNTOV Delay 10ms

Freq.

Calculating

HCNTH = '00'

?

Yes Off Mode

No

Suspend Mode

1. Extract VCNTL/H 12 bit data

2. HSEL = '1'

12 bit data X 8µ s

= Vsync. time duration

3. Its reciprocal

is Vsync. freq.

4. HSEL = '0'

12 bit data X 8.192ms

= Vsync. freq.

Worng Mode

1. Extract HCNTL/H 12 bit data

2. 12 bit data * Vsync. freq.

= Hsync. freq.

3. Its reciprocal

is Hsync. time duration.

Return

Return

Figure 19. H & V Sync. Software Control Flowchart (for reference only)

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