32.8.111 Screening Type 1 Register x Priority Queue
Screening type 1 registers are used to allocate up to 6 priority queues to received frames based on certain IP or UDP fields of incoming frames.
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | SCRT1 |
| Offset: | 0x1500 + n*0x04 [n=0..3] |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| UDPE | DSTCE | UDPP[15:12] | |||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| UDPP[11:4] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| UDPP[3:0] | DSTCM[7:4] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DSTCM[3:0] | QNMBR[2:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
Bit 29 – UDPE UDP Port Match Enable
When this bit is written to '1', the UDP Destination Port of the received UDP frame is matched against the value stored in the bit field UDPP.
Bit 28 – DSTCE Differentiated Services or Traffic Class Match Enable
When this bit is written to '1', the DS (differentiated services) field of the received IPv4 header or TC field (traffic class) of IPv6 headers are matched against the value stored in bit field DSTCM.
Bits 27:12 – UDPP[15:0] UDP Port Match
When UDP port match enable is set (UDPME=1), the UDP Destination Port of the received UDP frame is matched against this bit field.
Bits 11:4 – DSTCM[7:0] Differentiated Services or Traffic Class Match
When DS/TC match enable is set (DSTCE), the DS (differentiated services) field of the received IPv4 header or TC field (traffic class) of IPv6 headers are matched against this bit field.
Bits 2:0 – QNMBR[2:0] Queue Number
If a match is successful, then the queue value programmed in this bit field is allocated to the frame.