NXP Semiconductors Lite5200B, Руководство пользователя, Страница: 17 / 138

Memory Configuration
LITE5200B User’s Manual, Rev. 0
Freescale Semiconductor 4-3
4.3.4 PCI +/- 12 Volt Supply Jacks
–
J5 J8
These supplies p12v and -12v to the PCI transceiver IC. This will be required for any cards which
require a separate 12v supply
1
.
These banana jacks are used to 12V and -12V to the PCI connectors. If the ATX power connector
(J36) is used instead of the 5V power input (J35) then power must not be provided on J5.
Since most PCI cards do not require -12V there is usually no need to provide -12V on J8. Many PCI cards
to not require 12V in which case there is no need to p12V on J5 or the ATX power connector (36).
4.4 Memory Configuration
This section will describe the physical memories implemented in the Lite5200B. For further information
on logical memory organization please refer to Section 5.2, “Memory Map,” on page 5-1.
4.4.1 Flash Memory
4.4.1.1 Main Flash
The Lite5200B is provided with 32 Megabytes of 8-bit flash in a non-muxed configuration. The memory
uses 2 flash devices connected to CS0 & CS1. These devices are U12 and U16 with CS0 going to U12 and
CS1 going to U16.
Table 4-3. Connectors – J32/J28/J27/J26/J25
Connector
1
1
The banana jacks are for monitoring the voltage of the various supplies on the
board. They should not be used for power measurement. Providing power to the
board through the banana jacks will create unsafe conditions since the 5V jack
is not fused and putting power into the 1.5V, 2.5V, and 3.3V jacks will cause a
conflict with the on board regulators
Description Voltage
J32 GND GND
J25 Core Supply 1.5 v
J26 DDR Power Supply 2.5 v
J27 Regulated 5 v
J28 IO Supply 3.3 v
1. This 12v supply does not correlate to bus voltage. It is supplied only as a separate power source required by high performance PCI devices.
Note: The MPC5200B does not support 5v PCI devices. Please see Section 4.5.8, “PCI – J13 J14,” on page 4-12.
Table 4-4. Connectors – J5/J8
Connector Voltage
J5 +12 v
J8 -12 v