38.3 Endpoint Bank, Extended
| 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: | EXTREG - Device |
| Offset: | 0x08 |
| Reset: | 0xxxxxxxx |
| Property: | NA |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| VARIABLE[10:4] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset | x | x | x | x | 0 | 0 | 0 | ||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| VARIABLE[3:0] | SUBPID[3:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | x | x | x | x | |
Bits 14:4 – VARIABLE[10:0] Variable field send with extended token
These bits define the VARIABLE field of a received extended token. These bits are updated when the USB has answered by an handshake token ACK to a LPM transaction. See Section 2.1.1 Protocol Extension Token in the reference document “ENGINEERING CHANGE NOTICE, USB 2.0 Link Power Management Addendum”.
To support the USB2.0 Link Power Management addition the VARIABLE field should be read as described below.
| VARIABLES | Description |
|---|---|
| VARIABLE[3:0] | bLinkState (1) |
| VARIABLE[7:4] | BESL (2) |
| VARIABLE[8] | bRemoteWake (1) |
| VARIABLE[10:9] | Reserved |
- For a definition of LPM Token bRemoteWake and bLinkState fields, refer to "Table 2-3 in the reference document ENGINEERING CHANGE NOTICE, USB 2.0 Link Power Management Addendum".
- For a definition of LPM Token BESL field, refer to "Table 2-3 in the reference document ENGINEERING CHANGE NOTICE, USB 2.0 Link Power Management Addendum" and "Table X-X1 in Errata for ECN USB 2.0 Link Power Management.
Bits 3:0 – SUBPID[3:0] SUBPID field send with extended token
These bits define the SUBPID field of a received extended token. These bits are updated when the USB has answered by an handshake token ACK to a LPM transaction. See Section 2.1.1 Protocol Extension Token in the reference document “ENGINEERING CHANGE NOTICE, USB 2.0 Link Power Management Addendum”.