wt8048 ETC-unknow, wt8048 Datasheet - Page 7

• Manufacturer Part Number: wt8048
• Description: Dpms Display Power Management Signaling Detector For Green Monitor
• Manufacturer: ETC-unknow

The Way WT8048 implements VESA DPMS
As shown on Table 2, when H_SYNC / V_SYNC signals transition from ON state to any one
of the three power saving state, WT8048 will delay 5.9 seconds to meet the VESA DPMS
requirement: the minimum 5 seconds delay to avoid unintentionally entering a power saving
state during display resolution and timing mode changes. If during this delay time period,
H_SYN and V_SYN signals return to ON state, then all three power management pins will
remain ON state. If power management state of H_SYNC and V_SYNC prolong for more
than 5.9 seconds, then these three power management pins will change to the corresponding
states. While changing from any power saving state back to ON state will take about 0.368
second for H_SYNC / V_SYNC pulse checking. And transition between any power saving
state will be done immediately.
ON
STAND_BY
SUSPEND
OFF
OVERRIDE
eltrend
MODE
Table 2: The truth table of Power Saving Detector
No Pulses
No Pulses
No Pulses
Pulses
Pulses
Manually Power On
H
SIN
Pulses
Pulses
Pulses
Pulses
Pulses
V
No
No
No
SIN
STD_B
Y
1
0
0
0
1
SUSPEND
1
1
0
0
1
WT8048
OFF
1
1
1
0
1
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