The RX termination use modes are covered in this table. This is added to or updated in the 7 Series FPGAs GTP Transceivers User Guide (UG482) v1.4.
| Use Mode | External AC Coupling | Term Voltage | Max Swing mVDPP | Suggested Protocols and Usage Notes |
|---|---|---|---|---|
| 1 | On |
Gnd |
1200 |
|
| 2 | On |
AVTT |
1200 |
Protocol: CEI-6 (1200 mVDPP) Wireless Serial RapidIO Attribute Settings: RX_CM_SEL[1:0] = 2b00 RXLPM_INCM_CFG = 1'b1 RXLPM_IPCM_CFG = 1'b0 |
| 3 | On |
800 mV |
2000 |
Protocols: Optical IF (SONET/SDH/OTU), XAUI (1600 mVdpp),GbE, PCIe CEI-6 (1200 mVDPP) Wireless Serial RapidIO Attribute Settings: RX_CM_SEL [1:0] = 2b11 RX_CM_TRIM[3:0] = 4b1010 RXLPM_INCM_CFG = 1'b1 RXLPM_IPCM_CFG = 1'b0 |
| 4 | Off |
Float |
2000 |
Protocol: GPON Attribute Settings: RX_CM_SEL[1:0] = 2b10 Depends on circuit implementation. Likely High Common Mode RXLPM_INCM_CFG = 1'b1 RXLPM_IPCM_CFG = 1'b0 |
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 47852 | 7 Series FPGAs GTP Transceivers - Known Issues and Answer Record List | N/A | N/A |
| AR# 51448 | |
|---|---|
| Date | 10/04/2013 |
| Status | Active |
| Type | General Article |
| Devices | |