Strapping Options
© 2008 Advanced Micro Devices, Inc.
41978 AMD RS690M Databook 3.06
Proprietary
3-19
Table 3-18 Strap Definition for GPPSB_LINK_CONFIG
Strap Pin Value
Link Width
Configuration
DFT_GPIO4
DFT_GPIO3
DFT_GPIO2
SB
GPP1 GPP2 GPP3 GPP4
1
1
1
Use register field
STRAP_BIF_LINK_CONFIG_GPPSB
of register StrapsOutputMux_7
(NBMISCIND: 0x67 bit[7:4]) to
define link configuration (Default).
-
1
1
0
4
0
0
0
0
A
1
0
1
4
4
0
0
0
B
1
0
0
4
2
2
0
0
C
0
1
1
4
2
1
1
0
D
0
1
0
4
1
1
1
1
E
Others
Use register field
STRAP_BIF_LINK_CONFIG_GPPSB
of register StrapsOutputMux_7
(NBMISCIND: 0x67 bit[7:4]) to define
link configuration.
-
Note:
The three strap pins are internally pulled up so that if left unconnected on the motherboard, the
RS690M will use register field
STRAP_BIF_LINK_CONFIG_GPPSB of register StrapsOutputMux_7
(NBMISCIND: 0x67 bit[7:4])
to define the link configuration. The power on default value of this register
corresponds to Configuration E. If the pin straps are used, the GPPSB configuration will then be
determined according to this table and cannot be changed after the system has been powered up.