WT8048N4 View Datasheet(PDF) - Weltrend Semiconductor
Part Name
Description
MFG CO.
WT8048N4 Datasheet PDF : 10 Pages
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eltrend
WT8048
Synchronization Signals
The basis of DPMS standard is the condition of the synchronization signals to the display.
Two conditions are defined: pulses and no pulses.
{ PULSES
pulses for the Horizontal Sync. Signal are defined as greater than 10KHz repetition
frequency and pulses for the Vertical Sync. Signal are defiened as greater than 40Hz
repetition frequency.
{ NO PULSES
No pulses is defined as less than 10Hz repetition frequency with less than 25% duty cycle
Please refer to the Fig. 1 for the way WT8048 Implement pulses/ no pulses state, between
10Hz and 15KHz / 10KHz, 10Hz and 40Hz. WT8048 use hystersis technique to stable state in
between.
STATE
P
NP
10 Hz
fT
H_SYNC
FREQUENCY
f = 15k for WT8048
T
= 10k for WT8048N1/N2/N3/N4
STATE
P
NP
10 Hz
40 Hz
V_SYNC
FREQUENCY
Figure 1: pulses / no pulses state implementation
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