5.2.3 10BASE-T1S PMA Control
| Name: | T1SPMACTL |
| Address: | 0x08F9 |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| RST | TXD | LPE | MDE | ||||||
| Access | R/W SC | R/W | RO | RO | R/W | R/W | RO | RO | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LBE | |||||||||
| Access | RO | RO | RO | RO | RO | RO | RO | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit 15 – RST PMA Reset
Note: This bit is
self-clearing. When setting this bit, do not set other bits in this
register.
| Value | Description |
|---|---|
0 |
Normal Operation |
1 |
PMA Reset |
Bit 14 – TXD Transmit Disable
| Value | Description |
|---|---|
0 |
Normal operation |
1 |
Transmit disable |
Bit 11 – LPE Low Power Enable
Note: This bit has the same
effect as the Power Down bit in the Clause 22 BASIC_CONTROL
register.
| Value | Description |
|---|---|
0 |
Normal operation |
1 |
Place PMA into low-power mode |
Bit 10 – MDE Multidrop Enable
When set, this bit will enable multidrop operation on a mixing segment.
Note: This bit has no effect on the operation of the
device.
| Value | Description |
|---|---|
0 |
Disable mixing segment operation (point-to-point mode) |
1 |
Enable PMA multidrop (mixing segment) operation |
Bit 0 – LBE PMA Loopback Enable
This bit will enable the PMA loopback test mode when set. Data received from the MAC via the media interface will be passed through the PCS scrambler/descrambler, 4B/5B encoder/decoder, and the PMA differential Manchester encoder/decoder and returned back to the MAC.
Important: PLCA must be disabled or configured as
the PLCA Coordinator (Local ID = 0) when the PMA loopback mode is enabled.
| Value | Description |
|---|---|
0 |
Disable PMA loopback mode |
1 |
Enable PMA loopback mode |