CHAPTER 7 PCI CONTROLLER
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Preliminary User’s Manual S15543EJ1V0UM
7.5.5 P_PCAR (PCI Configuration Address Register)
PCAR register is used to set the information for Configuration Cycle. How to generate Configuration Cycle is
described in
7.4.1 Generating configuration cycle
.
The PCI Controller can executes Configuration Cycle only in Host-mode.
R/W
Bits
Field
Internal
bus
PCI
Default
Description
31
COCEN
R/W
R
0
Configuration Cycle Generation Enable.
When the bit is set to a ‘1’, reading from/writing to PCDR
generates Configuration Cycle.
When this bit is set to a ‘0’, reading from/writing to PCDR does
not generate Configuration Cycle.
30:24
Reserved
-
-
0
Hardwired to ‘0’s
23:16
BUSNM
R/W
R
0
Bus Number.
15:11
DEVNM
R/W
R
0
Device Number.
10:8
FNCNM
R/W
R
0
Function Number.
7:2
REGAC
R/W
R
0
Offset Address for each device.
1:0
CYCTP
R/W
R
00
Select Configuration Cycle Type.
‘00’: Configuration Type 0
‘01’: Configuration Type 1
7.5.6 P_PCDR (PCI Configuration Data Register)
PCDR register is used to read/write configuration data during Configuration Cycle. How to generate Configuration
Cycle is described in
7.4.1 Generating configuration cycle
.
The PCI Controller can executes Configuration Cycle only in Host-mode.
R/W
Bits
Field
Internal
bus
PCI
Default
Description
31:0
PCDR
R/W
R
0
The data during Configuration Cycle.