ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 579

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

GeodeLink™ PCI Bridge Register Descriptions
AMD Geode™ LX Processors Data Book
63:60
59:56
55:52
51:48
47:44
43:40
39:36
35:32
31:24
Bit
23
22
21
Name
CR
R2
R1
R0
CH
H2
H1
H0
RSVD (RO)
COV
OV2
OV1
Description
CPU Repeat. Controls the number of consecutive grants given to the CPU before rotat-
ing to the next requestor. This is only valid if there is a non-zero value for the CPU Hold-
Grant control (CH, bits [47:44]). This may be overidden by either OV2, OV1 or OV0 (bits
[22:20]). It is also ignored if the CPRE (bit 11) is cleared.
Request Repeat 2. Controls the number of consecutive grants given to PCI requestor 2
before rotating to the next requestor. This is only valid if there is a non-zero value for the
Request Hold-Grant2 control (H2, bits [43:40]). This may be overidden by either COV,
OV1, or OV0 (bits [23,21,20]. It is also ignored if the ARB.PRE2 bit is cleared.
Request Repeat 1. Controls the number of consecutive grants given to PCI requestor 1
before rotating to the next requestor. This is only valid if there is a non-zero value for the
Request Hold-Grant1 control (H1, bits [39:36). This may be overidden by either COV,
OV2, or OV1 (bits [23,22,21]. It is also ignored if the PRE1 (bit 9) is cleared.
Request Repeat 0. Controls the number of consecutive grants given to PCI requestor 0
before rotating to the next requestor. This is only valid if there is a non-zero value for the
Request Hold-Grant0 control (H0, bits [35:32]). This may be overidden by either the
ARB.COV, ARB.OV2 or ARB.OV1 controls. It is also ignored if PRE0 (bit 8) is cleared.
CPU Hold-Grant Controls. Controls the number of PCI clock edges that the PCI bus
must be idle after a CPU transaction before arbitration continues. This is only valid if
there is a non-zero value for the CPU Repeat field (CR, bits [63:60]). This may be overid-
den by either OV2, OV1, or OV0 (bits [22,21,20]). It is also ignored if CPRE (bit 11) is
cleared.
Request Hold-Grant 2. Controls the number of PCI clock edges that the PCI bus must
be idle after a requestor 2 transaction before arbitration continues. This is only valid if
there is a non-zero value for the Request Repeat 2 field (R2, bits [59:56]). This may be
overidden by either COV, OV1, or OV0 (bits [23,21,20]). It is also ignored if if PRE2 (bit
10) is cleared.
Request Hold-Grant 1. Controls the number of PCI clock edges that the PCI bus must
be idle after a requestor 1 transaction before arbitration continues. This is only valid if
there is a non-zero value for the Request Repeat 1 field (R1, bits [55:52]). This may be
overidden by either COV, OV1, or OV0 (bits [23,21,20]). It is also ignored if the if PRE2
(bit 10) is cleared.
Request Hold-Grant 0. Controls the number of PCI clock ticks that the PCI bus must be
idle after a requestor 0 transaction before arbitration continues. This is only valid if there
is a non-zero value for the Request Repeat 0 field (R0, bits [51:48]). This may be overid-
den by either COV, OV1, or OV0 (bits [23,21,20]). It is also ignored if PRE2 (bit 10) is
cleared.
Reserved (Read Only). Reserved for future use.
CPU Override. Enables the CPU to override the repeat-count and grant-hold for other
requestors. When COV is set and the CPU is requesting access to PCI, repeat-count and
grant-hold mechanisms for other masters are temporarily disabled. This bit does not
change the round robin arbitration cycle, it only overrides repeat-count and grant-hold for
other requestors.
Override 2. Enables requester2 to override the repeat-count and grant-hold for other
requestors. When OV2 is set and REQ2# is asserted, repeat-count and grant-hold mech-
anisms for other masters are temporarily disabled. This bit does not change the round
robin arbitration cycle, it only overrides repeat-count and grant-hold for other requestors.
Override 1. Enables requester1 to override the repeat-count and grant-hold for other
requestors. When OV1 is set and REQ1# is asserted, repeat-count and grant-hold mech-
anisms for other masters are temporarily disabled. This bit does not change the round
robin arbitration cycle, it only overrides repeat-count and grant-hold for other requestors.
GLPCI_ARB Bit Definitions
33234C
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