TUSB1002: TUSB1002 PCIE Gen1 function support

user4773197

Part Number: TUSB1002

Hi Team,

Customer will use TUSB1002 for PCIE gen 1 re-driver, please help confirm TUSB1002 could compatible to support from PCIE Gen3 down to Gen1 function.

Because TI TUSB1002 datasheet didn't mentioned it to include PCIE Gen1,customer required TI to confirm, thanks.

"7.3.7 PCIe/SATA/SATA Express Redriver Operation (MODE = “R”; CFG1 = "0"; CFG2 = "0" ) The TUSB1002 can be used as a PCI Express (PCIe) Gen3, SATA Gen3, or SATA Express redriver. When TUSB1002's MODE pin = “R”, CFG1 pin = "0", and CFG2 pin = "0", the TUSB1002 will enable both channels (upstream and downstream) receiver and transmitter paths upon detecting far-end termination on both TX1 and TX2. Both upstream and downstream paths will remain enabled until EN pin is de-asserted low. All USB3.1 power management functionality is disabled in this mode. In this mode the TUSB1002 is transparent to PCIe link power management (L0s, L1) and SATA interface power states. Once far-end termination is detected on both TX1 and TX2, the TUSB1002 power will be at P(U0_SSP_1200mV) regardless of the PCIe or SATA power state. To save power during system S3/S4/S5 states it is suggested to de-assert the EN pin to conserve power."

Best regard,

Daisy Yang

over 5 years ago

0 David (ASIC) Liu over 5 years ago

TI__Guru**** 153861 points

Daisy

PCIe Gen 3 is backward compatible with PCIe Gen 1, so TUSB1002 will support PCIe Gen 1.

Please use TUSB1002A instead TUSB1002.

Thanks
David

0 user4773197 over 5 years ago in reply to David (ASIC) Liu

TI__Prodigy 560 points

Hi David,

Customer request to have low power mode for PCIE gen1, we saw only TUSB1002 have sleep mode, so we proposed non-A version.

Do you have any other suggestion ?

Best regard,

Daisy

0 David (ASIC) Liu over 5 years ago in reply to user4773197

TI__Guru**** 153861 points

Daisy

The TUSB1002A power is at P(U0_SSP_1200mV) when both its upstream and downstream paths are enabled. In order to save system power in system S3/S4/S5 states, it is suggested to control the TUSB1002A EN pin. Anytime the system enters a low power state (S3, S4, or S5), it is suggested to de-assert the EN pin. While EN pin is de-asserted, the TUSB1002A will consume P(SHUTDOWN). Assertion of this pin is necessary anytime the system exits a lower power state.

Thanks
David

0 user4773197 over 5 years ago in reply to David (ASIC) Liu

TI__Prodigy 560 points

Hi David,

1.Could you please check if have TUSB1002A PCIE modern standby state ?

2.Or do you know if TUSB1002A pcie redriver support L1/L2 state? We don’t seen the PCIE have L1.2 state, only support L0/L1

Daisy

0 David (ASIC) Liu over 5 years ago in reply to user4773197

TI__Guru**** 153861 points

Daisy

TUSB1002A is either active or in the SHUTDOWN mode (EN pin de-asserted), it does not support individual low power link state.

Thanks
David

0 Nasser Mohammadi over 5 years ago in reply to David (ASIC) Liu

TI__Guru* 93090 points

Hi Daisy,
It's been few days with no update on this case. I am assuming this issue is now closed. We are going to close this case. Please re-open this case if you have a new update related to this case.
Regards,,nasser

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TUSB1002: TUSB1002 PCIE Gen1 function support