Compaq iPAQ Internet Device Manual De Usuario
Chapter 6 Graphics Subsystem
Compaq iPAQ Family of Internet Devices
First Edition - March 2000
6-6
6.6
MONITOR POWER MANAGEMENT CONTROL
This controller provides monitor power control for monitors that conform to the VESA display
power management signaling (DPMS) protocol. This protocol defines different power
consumption conditions and uses the HSYNC and VSYNC signals to select a monitor’s power
condition. Table 6-5 lists the monitor power conditions.
power management signaling (DPMS) protocol. This protocol defines different power
consumption conditions and uses the HSYNC and VSYNC signals to select a monitor’s power
condition. Table 6-5 lists the monitor power conditions.
Table 6-4.
Monitor Power Management Conditions
Table 6-5.
Monitor Power Management Conditions
HSYNC
VSYNC
Power Mode
Description
Active
Active
On
Monitor is completely powered up. If activated, the inactivity
counter counts down during system inactivity and if allowed to
tiemout, generates an SMI to initiate the Suspend mode.
counter counts down during system inactivity and if allowed to
tiemout, generates an SMI to initiate the Suspend mode.
Active
Inactive
Suspend
Monitor’s high voltage section is turned off and CRT heater
(filament) voltage is reduced from 6.6 to 4.4 VDC. The Off mode
inactivity timer counts down from the preset value and if allowed to
timeout, another SMI is generated and serviced, resulting in the
monitor being placed into the Off mode. Wake up from Suspend
mode is typically a few seconds.
(filament) voltage is reduced from 6.6 to 4.4 VDC. The Off mode
inactivity timer counts down from the preset value and if allowed to
timeout, another SMI is generated and serviced, resulting in the
monitor being placed into the Off mode. Wake up from Suspend
mode is typically a few seconds.
Inactive
Inactive
Off
Monitor’s high voltage section and heater circuitry is turned off.
Wake up from Off mode is a little longer than from Suspend.
Wake up from Off mode is a little longer than from Suspend.
6.7 MONITOR
CONNECTOR
The Deskpro EN SFF models provide a DB-15 connector on the rear chassis panel for connection
to an analog monitor. The pinout for this connector is shown in Figure 6-3 and Table 6-6.
to an analog monitor. The pinout for this connector is shown in Figure 6-3 and Table 6-6.
Figure 6-3.
VGA Monitor Connector, (Female DB-15, as viewed from rear).
Table 6-5.
DB-15 Monitor Connector Pinout
Table 6-6.
DB-15 Monitor Connector Pinout
Pin
Signal
Description
Pin
Signal
Description
1
R
Red Analog
9
PWR
+5 VDC (fused) [1]
2
G
Blue Analog
10
GND
Ground
3
B
Green Analog
11
NC
Not Connected
4
NC
Not Connected
12
SDA
DDC2-B Data
5
GND
Ground
13
HSync
Horizontal Sync
6
R GND
Red Analog Ground
14
VSync
Vertical Sync
7
G GND
Blue Analog Ground
15
SCL
DDC2-B Clock
8
B GND
Green Analog Ground
--
--
--
NOTES:
[1] Fuse automatically resets when excessive load is removed.
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