W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 146

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Device Status Register (DSR)
Port address: 0xf0000379
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
This read-only register reflects the inputs on the Parallel Port Interface and some of device
data FIFO and Command Register status.
W90221X version 0.6
BUSY#
0
0
1
0
1
0
1
NACK
1
Inverted parallel port interface signal “ Busy”
Parallel port interface signal “ nAck”
Parallel port interface signal “ Perror”
Parallel port interface signal “ Select”
Parallel port interface signal “ nFault”
Echo device data FIFO empty status
Device data FIFO is not empty
Device data FIFO is empty
Echo device data FIFO full status
Device data FIFO is not full
Device data FIFO is full
Command pended
Command register (CMD) contains no command code
A command code is in CMD which has not been transferred yet.
PE
2
Access type: read
SEL
3
NFAULT
4
EMPTY
5
FULL
6
Default: 0x---
CMDTRUE
7
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