W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 54

• 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.
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Bits 6
Bits 7
Data Register (DR)
Port address : 0xf000037f
Bits 0-7 Latched Line status
This register is added to support "Peripheral Emulation Mode" operation.
Device Data FIFO (Dfifo)
Port address : 0xf0000370
0
0
8
"nFault" Interrupt flag
"nAck" Interrupt flag
The status of data lines of PPI will be latched into this register if a high-to-low
transition is happened on "nAck" pin.
"Reset" situation : CPU read Dfifo such that data bytes in Dfifo are below the thresh-
"Set" situation
"Reset" situation : CPU read Device Status Register (DSR).
"Set" situation
"Reset" situation : CPU read Device Status Register (DSR).
1
1
9
10
2
2
: If IER[6] is set, and a high-to-low transition is on "nFault" pin.
: If DCR[3] is set, and a low-to-high transition is on "nAck" pin.
8-bit Data of latched Lines status
hold level.
Read only
Read/write
Dfifo MSB byte
11
3
3
12
4
4
Power-on Default : ---
Power-on Default : ---
13
5
5
14
6
6
15
7
7
W90220F
Version 0.84