Peripheral Control Module

11.8.9.7Bits 7..6 Reserved

Bits 7..6 are reserved for future use.

 

Address: 0h 8000 0018

 

UDCCS2

 

Read/Write

 

Bit

7

6

 

5

4

3

2

1

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Res.

 

FST

SST

TUR

TPE

 

TPC

 

TFS

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset

0

0

 

0

0

0

0

0

 

0

Bit

Name

 

Description

 

 

 

0

TFS

Transmit FIFO service (read-only).

 

 

0

– Transmit FIFO has more than 8 bytes.

 

 

1

– Transmit FIFO has 8 bytes or less.

 

 

 

1

TPC

Transmit packet complete (read/write 1 to clear).

 

 

0

– Error/status bits invalid.

 

 

1

– Transmit packet has been sent and error/status bits are valid.

 

 

 

2

TPE

Transmit packet error (read-only).

 

 

0

– Transmit packet was received with no errors.

 

 

1

– Transmit packet has errors and the host did not issue ACK. Valid only when RPC is

 

 

set.

 

 

 

3

TUR

Transmit FIFO underrun.

 

 

1

– Transmit FIFO experienced an underrun. Valid only when TPC is set.

 

 

 

4

SST

Sent STALL (read/write 1 to clear).

 

 

1

– STALL handshake was sent. Valid only when TPC is set.

 

 

 

5

FST

Force STALL (read/write).

 

 

1

– Issue STALL handshakes to IN tokens.

 

 

 

7..6

Reserved.

 

 

Always reads zero.

 

 

 

 

SA-1100 Developer’s Manual

11-73

Page 223
Image 223
Intel SA-1100 manual UDCCS2, Fst Sst Tur Tpe Tpc Tfs