W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 175

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

Bit 10-15 Reserved
Status Register (STUS)
Port address : 0xf000038a
Bits 0 RX-FIFO data available
Bit 1 TX-FIFO space available
Bit 2 RX-FIFO overrun
is reset.
Bit 3-6 Reserved
Bit 7 RX-FIFO interrupt request
level.
level.
Bit 8 TX-FIFO interrupt request
W90221X version 0.6
RXDA
IntTX INTRER
0
8
0 = There is no space available in TX-FIFO.
1 = The TX-FIFO can still accept at least one data word.
0 = There is no valid data word in RX-FIFO.
1 = There is at least one valid data word in RX-FIFO.
0 = The RX-FIFO works well.
1 = The RX-FIFO is already overrun.
Once the RX-FIFO is overrun, this bit will keep active until RX-FIFO
1 = A RX-FIFO interrupt request is pending
1 = A TX-FIFO interrupt request is pending
0 = No RX-FIFO interrupt request
0 = No TX-FIFO interrupt request
TXSA RXERR
R
1
9
Set
Reset = Valid data words in RX-FIFO drops below the threshold
= Valid data words in RX-FIFO exceeds the threshold
10
2
11
3
Read/Write Power-on Default : --
12
4
Reserved
Reserved
13
5
14
6
IntRX
15
7
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