Register Descriptions
MVME4100 Single Board Computer Programmer’s Reference (6806800H19D)
33
PCI_1_SPD
PCI Bus 1 Speed. Indicates the frequency of PCI bus 1.
00: 33 MHz
01: 66 MHz
10: 100 MHz
11: 133 MHz
PCIX_1
PCI-X Bus 1. A set condition indicates that bus 1 is operating in PCI-X mode.
Cleared indicates PCI mode.
PCI_1_64B
PCI Bus 1 64-bit. A set condition indicates that bus 1 is enabled to operate in
64-bit mode. Cleared indicates 32-bit mode.
RSVD
Reserved for future implementation.
Table 3-10
PCI Bus 2 Status Register
REG
PCI Bus 2 Status Register - 0xF200 0009
BIT
7
6
5
4
3
2
1
0
Field
3.3V_VIO
5.0V_VIO
RSVD
RSVD
PCI_2_64B
PCIX_2
PCI_2_SPD
OPER
R
R
R
R
R
R
R
R
RESET
X
X
X
0
1
X
X
X
PCI_2_SPD
PCI Bus 2 Speed. Indicates the frequency of PCI bus 2.
00: 33 MHz
01: 66 MHz
10: 100 MHz
11: 133 MHz
PCIX_2
PCI-X Bus 2. A set condition indicates that bus 2 is operating in PCI-X mode.
Cleared indicates PCI mode.
PCI_2_64B
PCI Bus 2 64-bit. A set condition indicates that bus 2 is enabled to operate in 64-
bit mode. Cleared indicates 32-bit mode.
5.0V_VIO
5.0V VIO Enabled. This bit set indicates that the PMC bus (PCI Bus 2) is
configured for 5.0V VIO.
3.3V_VIO
3.3V VIO Enabled. This bit set indicates that the PMC bus (PCI Bus 2) is
configured to 3.3V VIO.
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