W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 53

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
53
Bit 6
Bit 7
Interrupt Identification Register (IIR)
Port address : 0xf000037e
Bits 2
Bits 3
Bits 4
Bits 5
0
Reserved
"nFault" Interrupt (Irpt_nFault) enable
Loop back enable
During Loop-Back mode, {nStrobe, nAutoFd, nInit, nSelectIn} will be fed to
{nAck, Busy, PError, nFault} internally. This mode is used only for test issue.
Time-Out Interrupt flag
DMA Terminal Count Interrupt flag
Dfifo Empty Interrupt flag
Dfifo Read Threshold Interrupt flag
0 = Mask Irpt_nFault
1 = Enable Irpt_nFault
0 = Loop-back disable
1 = Loop-back enable
"Set" situation
"Reset" situation : Reset device, or CPU reads Time-Out Register (TOR) or Dfifo
"Set" situation
"Reset" situation : TC is deasserted by DMA controller.
"Set" situation
"Reset" situation : CPU write new data into Dfifo.
"Set" situation
1
Irpt_Tout
2
: If IER[2] is set, and "Time out" is occured during parallel port
: If IER[3] is set, and TC is asserted by DMA controller once DMA
: If IER[4] is set, and Dfifo is empty during "forward transfering".
: If IER[5] is set, and data bytes received by Dfifo are exceeded the
transfering.
being accessed either by CPU or parallel port interface transfering.
transfer is done.
threshold level (defined in FCR[4:5] ) during "reverse transfering".
Read only
Irpt_TC Irpt_Temp Irpt_RDA Irpt_nFaul
3
4
Power-on Default : ---
5
6
t
Irpt_nAck
7
W90220F
Version 0.84