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Note: The fault trip currents listed above are design values. Noisy power sources can lower the fault trip
Note: Over-current on the -12 V supply does not activate the fault trip circuit breaker and the LED will
2.3.7
2.3.8
2.3.9
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current limits to less than the minimum design values.
not turn amber. -12 V is over-current protected by a resettable (PTC) 0.75 A fuse.
Rear-Panel I/O
The following I/O signals are available from the J5 connector at the back of the ZT 5515 (see
Table 26 on page
68). These signals are available for use by a rear panel transition board such as
the ZT 4807.
•
Serial ports (COM1 and COM2)
•
USB Ports 2 and 3
•
Floppy Interface
•
Keyboard
•
PS/2 mouse
•
Push button reset input
•
Secondary IDE channel
•
SMBus
•
Ejector
•
Video
•
Speaker Output (AT compatible)
PCI Video
The ZT 5515 provides on-board video through a Silicon Motion* LynxEM+* ultra low power
video chip. This device is configured for PCI bus transactions at speeds up to 33 MHz.
The Lynx chip incorporates 2 Mbyte of integrated SDRAM for the graphics/video frame buffer.
Video signals are available at the ZT 5515's J25 faceplate connector or at the J5 Rear Panel I/O
connector (see
Table 28, "J25 VGA Connector Pinout" on page 70
O Connector Pinout" on page
See
Section 4.2.9, "SW3-4 (VGA Routing Control)" on page 32
signals to the front or rear of the board.
The
"Video"
topic in
Appendix D
PCI Mezzanine Card (PMC) Interface
The ZT 5515A-1A provides a location for one on-board PMC device with front panel access. The
PMC interface is on PCI Bus 0 and uses a 32-bit 3.3V PCI bus. The ZT 5515A-1A does not have a
primary IDE connector on-board nor a hard drive. In contrast, the ZT 5515B-1A does have an IDE
connector and hard drive, but does not have a PMC site.
TM
ZT 5515 Compute Processor Board Technical Product Specification
68).
contains a link to the datasheet for this device.
Introduction
and
Table 26, "J5 Rear Panel I/
for information on directing video
15
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