WT6116 Просмотр технического описания (PDF) - Weltrend Semiconductor

Номер в каталоге

Компоненты Описание

Список матч

WT6116

microcontroller for digital controlled monitor

Weltrend Semiconductor 

WT6132/WT6124/WT6116

Data Sheet Rev. 1.01

Vertical frequency counter

A 13-bit counter is used to measure the time interval between two vertical sync pulses. It will be updated

every vertical frame. The clock of this counter is 125kHz. So the frequency of Vsync is [125000 / (counter

value + 1)] Hz. When V frequency is lower than 15.25Hz, this counter stops counting and set VOVF bit to

“1”.

Vertical Frequency Register

Name Addr R/W Initial Bit 7

VFREQ_L 000Ah R xxh VF7

VFREQ_H 000Bh R xxh VLVL

Bit 6

VF6

VINPOL

Bit 5

VF5

VOVF

Bit4

VF4

VF12

Bit 3

VF3

VF11

Bit 2

VF2

VF10

Bit 1

VF1

VF9

Bit 0

VF0

VF8

Bit Name

Description

VLVL “1” : Indicates Vsync pin is high level.

“0” : Indicates Vsync pin is low level.

VNPOL “1” : Indicates Vsync input is positive polarity.

“0” : Indicates Vsync input is negative polarity.

VOVF Indicates V counter is overflowed when this is set. Vsync frequency is lower than 15.25Hz

VF12 ~ VF0 Indicates the Vertical Total Time. Vertical frequency is [125000 / (counter value +1) ] Hz

Example of Vsync Frequency Calculation

VF12..0 Max. Freq Min. Freq VF12..0

$05BDh 85.15Hz 85.034Hz $0783h

$05BEh 85.092Hz 84.976Hz $0784h

$05BFh 85.034Hz 84.918Hz $0785h

$0681h 75.12Hz

75.03Hz

$0823h

$0682h 75.075Hz 74.985Hz $0824h

$0683h 75.03Hz

74.94Hz

$0825h

$06C7h 72.088Hz 72.005Hz $1FFEh

$06C8h 72.046Hz 71.963Hz $1FFEh

$06C9h 72.005Hz 71.921Hz $1FFFh

Max. Freq

65.036Hz

65.003Hz

64.969Hz

60.038Hz

60.01Hz

59.981Hz

15.266Hz

15.264Hz

15.262Hz

Min. Freq

64.969Hz

64.935Hz

64.901Hz

59.981Hz

59.952Hz

59.923Hz

15.262Hz

15.260Hz

15.258Hz

Hsync period counter

This is an 8-bit counter that uses 6MHz clock to measure time interval between two H pulses. If the H

frequency is lower than 23437.5Hz, this counter will overflow and register H_PERD value is zero.

Horizontal Period Register

Name Addr R/W Initial Bit 7

H_PERD 000Ch R xxh HPRD7

Bit 6

HPRD6

Bit 5

HPRD5

Bit4

HPRD4

Bit 3

HPRD3

Bit 2

HPRD2

Bit 1

HPRD1

Bit 0

HPRD0

Bit Name Description

HPRD7 .. 0 H freq = 6MHz / (counter value+1)

Example of Hsync Frequency Calculation

HPRD7..0 Max. Freq Min. Freq HPRD7..0

$49h 83.333KHz 81.081KHz $7Ch

$4Ah 82.192KHz 80KHz

$7Dh

$4Bh 81.081KHz 78.947KHz $7Eh

$5Dh 65.217KHz 63.83KHz

$BFh

$5Eh 64.516KHz 63.158KHz $C0h

$5Fh

63.83KHz 62.5KHz

$C1h

Max. Freq

48.78KHz

48.387KHz

48KHz

31.579KHz

31.414KHz

31.25KHz

Min. Freq

48KHz

47.619KHz

47.244KHz

31.25KHz

31.088KHz

30.928KHz

Weltrend Semiconductor, Inc.

Page 11

Share Link: