MPC5200B Users Guide, Rev. 1
10-22 Freescale Semiconductor
Registers
10.3.2.10 Initiator Status Register PCIISR(RWC) —MBAR + 0x0D8810.3.2.11 PCI Arbiter Register PCIARB(RW) —MBAR + 0x0D8C
msb
0
123456789101112131415
RReserved RE IA TA Reserved
Wrwc rwc rwc
RESET 0 0 00000000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
RReserved
W
RESET 0 000000000000000
Bits Name Description
0:4 Reserved Unused bits. Software should write zero to this register.
5Retry
Error
(RE)
This flag is set if Max_Retries is set to a finite value (0x01 through 0xff) and the Target has
performed Max_Retries number of retry disconnects for a single transaction. A retry error
would generally indicate a broken or improperly accessed Target. A CPU interrupt will be
generated if PCIICR[RE] bit is set. This is a RWC (Read/WriteClear) bit: to clear it, software
must write a ‘1’ at this position.
6 Initiator Abort
(IA)
This flag bit is set if the PCI controller issues an Initiator Abort flag. This indicates that no
Target responded by asserting DEVSEL within the time allowed for subtractive decoding. A
CPU interrupt will be generated if the PCIICR[IAE] bit is set. This is a RWC
(Read/WriteClear) bit: to clear it, software must write a ‘1’ at this position.
7 Target Abort
(TA)
This flag bit is set if the addressed PCI Target has signalled an Abort. A CPU interrupt will
be generated if the PCIICR[TAE] bit is set. It is up to application software to query the
Target’s status register and determine the source of the error. This is a RWC
(Read/WriteClear) bit: to clear it, software must write a ‘1’ at this position.
8:31 Reser ved Unused bits. Software should write zero to this register.
msb 0123456789101112131415
RReserved ASR Reser ved
W
RESET 0 0 00000000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
RReserved
W
RESET 0 000000000000000
Bits Name Description
0:6 Reserved Unused bits. Software should write zero to this register.