Hello,
My customer has a question about DP83848.
[Q]
Please could you tell me a register mode of Compliance Test?
I refer to the following.
- Application Report 'How to Configure DP838xx for Ethernet Compliance Testing' (SNLA239A)
-> But I think that the Register in app note at P.13 and the Register of DP83848 do not correspond.
- E2E other thread 'DP83848 bit stream for compliance mode'
->Are only add 0x00 and add 0x1F interested? Other than Default?
<100 BASE-TX>
- Rise and Fall Time, Jitter
(App Note SNLA239A) -> (DP83848)
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x2100 //programs DUT to 100Base-TX Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI(MDIX) Mode
Reg 0x0009 = 0xBB00 ->Add ? = ? //Test Mode 5
Reg 0x0024 = 0x0480 -> Add ? = ? //output test mode to all channnels
- Differential Output Voltage, Signal Amplitude Symmetry, Waveform Overshoot
(App Note SNLA239A) -> (DP83848)
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x2100 //programs DUT to 100Base-TX Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI(MDIX) Mode
Reg 0x0009 = 0xBB00 ->Add ? = ? //Test Mode 5
Reg 0x0024 = 0x0480 -> Add ? = ? //output test mode to all channnels
(E2E other thread)
Reg 0x001F = 0x2407
But Reg 0x001F = reserved. Is it OK?
- Duty Cycle Distortion
(App Note SNLA239A) -> (DP83848)
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x2100 //programs DUT to 100Base-TX Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI(MDIX) Mode
Reg 0x0009 = 0xBB00 ->Add ? = ? //Test Mode 5
Reg 0x0024 = 0x0480 -> Add ? = ? //output test mode to all channnels
(E2E other thread)
Reg 0x001F = 0x2406
But Reg 0x001F = reserved. Is it OK?
- Return Loss
(App Note SNLA239A) -> (DP83848)
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x2100 //programs DUT to 100Base-TX Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI(MDIX) Mode
Reg 0x0009 = 0xBB00 ->Add ? = ? //Test Mode 5
Reg 0x0024 = 0x0480 -> Add ? = ? //output test mode to all channnels
<10 BASE-T>
- Link Pulse
(App Note SNLA239A) -> (DP83848)
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x0100 //programs DUT to 10Base-T/Te Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI Mode
- TP-IDLE, MAU, Internal, Jitter with TPM, Jitter without TPM, Differential Voltage, Harmonic Content, Common Mode Voltage, Return Loss, Common Mode Rejection
Reg 0x001F = 0x8000 -> Add 0x0000? = Default? //reset PHY
Reg 0x0000 = 0x2100 -> Add 0x0000 = 0x0100 //programs DUT to 10Base-T/Te Mode
Reg 0x0010 = 0x5008 -> Add 0x0019? = Default? //programs DUT to Forced MDI Mode
I'm sorry to trouble you, but I would appreciate it if you could tell us about Register.
Best Regards,
Kaede Kudo
