Freescale Semiconductor MPC5200B - Tx Next Address Pcitnar(R) -Mbar + 0 X

Registers
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor 10-27
10.3.3.1.5 Tx Next Address PCITNAR(R) —MBAR + 0x3810
12 Retry abort
Enable
(RE)
User writes this bit high to enable CPU Interrupt generation in the case of retry abort
termination of a packet transmission. It may be desirable to mask CPU interrupts in the case
that Multi-Channel DMA is controlling operation, but in such a case software should poll the
status bits to prevent a possible lock-up condition.
13 Target Abort
Enable
(TAE)
User writes this bit high to enable CPU Interrupt generation in the case of target abort
termination of a packet transmission. It may be desirable to mask CPU interrupts in the case
that Multi-Channel DMA is controlling operation, but in such a case software should poll the
status bits to prevent a possible lock-up condition.
14 Initiator Abort
Enable
(IAE)
User writes this bit high to enable CPU Interrupt generation in the case of initiator abort
termination of a packet transmission. It may be desirable to mask CPU interrupts in the case
that Multi-Channel DMA is controlling operation, but in such a case software should poll the
status bits to prevent a possible lock-up condition.
15 Normal
termination
Enable (NE)
User writes this bit high to enable CPU Interrupt generation at the conclusion of a normally
terminated packet transmission. This may or may not be desirable depending on the nature
of program control by Multi-Channel DMA or the processor core.
16:31 Reserved Unused. Software should write zero to these bits.
msb 012345678 9 1011121314 15
R Next_Address
W
RESET 0 00000000 0 0 0 00 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
R Next_Address
W
RESET 0 00000000 0 0 0 00 0 0
Bits Name Description
0:31 Next_Address This status register contains the next (unwritten) PCI address and is updated at the
successful completion of each PCI data beat. It represents a byte address and is updated
with the user-written Start_Add value whenever the Start_Add is reloaded. It is intended to
be accurate even in the case of abnormal terminations on the PCI bus.
Bits Name Description