P_Plba (Pci Lower Base Address Register); P_Ibba (Internal Bus Base Address Register); P_Verr (Version Register) - NEC uPD98502 User Manual

7.5.2 P_PLBA (PCI Lower Base Address Register)

When the PCI Controller issues 32-bit PCI address, this register contains PCI base address. When the access
from Internal bus-side to PCI-side comes, the PCI Controller replaces the upper 10 bits of the address on internal bus
with the upper 10 bits of this register, and issues as the address on PCI bus.
Bits Field
31:0 PLBA

7.5.3 P_IBBA (Internal Bus Base Address Register)

This register contains internal bus base address. When the access from PCI-side to internal bus-side comes, the
PCI Controller replaces the upper 10-bits of the address on PCI with the upper 10-bits of this register, and issues as
the address on internal bus.
Bits Field
31:0 IBBA

7.5.4 P_VERR (Version Register)

This register contains the version number of the PCI Controller. The upper 16 bits indicate the major version, and
the lower 16 bits indicate the minor version.
Bits Field
31:0 VERR
CHAPTER 7 PCI CONTROLLER
R/W Default
Internal PCI
bus
R/W R/W 0
(upper (upper
10 bits) 10 bits)
R R
(lower (lower
22 bits) 22 bits)
R/W Default
Internal PCI
bus
R/W R/W 0
(upper (upper
10 bits) 10 bits)
R R
(lower (lower
22 bits) 22 bits)
R/W Default
Internal PCI
bus
R/W R/W 0001_
(upper (upper 0000H
10 bits) 10 bits)
R R
(lower (lower
22 bits) 22 bits)
Preliminary User's Manual S15543EJ1V0UM
Description
PCI lower base address.
Upper 10 bits are readable/writeable.
Lower 22 bits are read-only.
Description
Internal bus base address.
Upper 10 bits are readable/writeable.
Lower 22 bits are read-only.
Description
Hardwired to "0001_0000H", which indicates the current version
of The PCI Controller.
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