PLX PEX 8648-AA, Справочник по аппаратуре

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PEX 8648-AA RDK Hardware Reference Manual, Version 1.2
Copyright © 2010 by PLX Technology, Inc. All rights reserved
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Table 3. PEX 8648 RDK Base Board Hardware Strapping DIP Switches – SW1, SW11,
SW4, SW5, SW9, SW6, SW2, and SW10
DIP
Switch
Switch Switch Strap Signal Description
Base Board
Default
Setting
SW1
4 – 1 UP-PORTSEL[3:0] Determines which Port is the upstream Port.
0000b
(Port 0)
5 Not used Don’t Care
6 NT-ENABLE# Enables (Low) or disables (High) NT mode. 1
8 – 7 NT-PORTSEL[1:0] Determines which Port is the upstream NT Port.
01b
(Port 1)
SW11 4 – 1 SHP-SLOT[3:0]
Determines which Port has Serial Hot-
Plug control. 0000b
(Port 8)
SW4 3 – 1 I2C-ADDR[2:0]
In combination with the I
2
C Configuration
register Slave Address field (offset 294h[6:3]),
determines the PEX 8648 switch’s
I
2
C Slave address.
111b
SW5
1 HP-ENABLE
Enables Hot-Plug capability to Port 5,
using Parallel Hot-Plug interface B.
1
2 HP-MRL-B#
Simulates the MRL# signal for Parallel Hot-Plug
capability to Port 5.
0
SW9
1 SHP-ENABLE
Enables Hot-Plug capability to Port 8, using the
Serial Hot-Plug interface.
1
2 SHP-MRL#
Simulates the MRL# signal for Serial Hot-Plug
capability to Port 8.
0
SW6
1 ONBOARD-10V-ON
Enables the on-board 1.0 VDC voltage
generator to the PEX 8648 switch.
1
2 ONBOARD-25V-ON
Enables the on-board 2.5 VDC voltage
generator to the PEX 8648 switch.
1
SW2
2 – 1 STN0-PORTCFG[1:0]
Determines the PEX 8648 switch Station 0
Port configuration. Default is x8x8.
10b
4 – 3 STN1-PORTCFG[1:0]
Determines the PEX 8648 switch Station 1
Port configuration. Default is x8x8.
10b
6 – 5 STN2-PORTCFG[1:0]
Determines the PEX 8648 switch Station 2
Port configuration. Default is x8x4x4.
11b
SW10
1 PLL-BYPASS#
Selects PLL_BYPASS function, to aid with
in-factory testing .
1
2 Not used Don’t Care
3 FAST-BRINGUP#
Selects FAST_BRINGUP function, to aid with
in-factory testing .
1
4 12-PORT-MODE Factory Test Only. 1
5 SERDES-MODE-EN#
Selects SERDES_MODE function, to aid with
in-factory testing .
1
6 PROBE-MODE#
Selects PROBE_MODE function, to aid with
in-factory testing .
1