Date: Tue, 30 Jan 2024 16:52:28 +0000 From: Adam Maunder To: Dan Edmunds Subject: Flash now signal Parts/Attachments: 1 OK 12 lines Text 2 Shown ~14 lines Text ---------------------------------------- Hello,For clarification on the start now signal for the flasher pulse: Right now on the interposer the start now is single ended (not differential LVDS) and goes directly to the DS1023-25 delay chip. This chip actually expects a 5V signal, but I've tested using a 3.3V pulse and there does not appear to be any issue with the delay, so I am looking for 3.3V LVCMOS. Unless there is reason to use LVDS, which would require a conversion to single-ended on the interposer to use the DS1023-25, I think we should stay with the single ended flash now signal. Also, the positive/rising edge is the expected "start now" signal and you had mentioned. Date: Tue, 30 Jan 2024 17:35:53 +0000 From: Dan Edmunds Reply-To: Dan Edmunds To: Adam Maunder Subject: Re: Flash now signal Hello Adam, All sounds good. - I will make pin #7 a 3V3 CMOS Flash_Pulse signal. I understand it to be a normal positive true logic signal, i.e. we will assert it to the +3V3 state to cause a flasher pulse. - What should I do with pin #8 (Flash_Pulse_N) ? I can float it or ground it or ?? - I understand that it is the Positive going edge of the pin #15 Flash_TDC signal that we need to time on the main board. Our TDC only works with positive going edges so we can directly use your Flash_TDC signal without inversion for our TDCs. - I believe that all signals, except UART Tx and Rx, are 3V3 CMOS levels. - Can you confirm for me which signal: pin # 31 Tx or pin #32 Rx is the UART data coming out of the Interposer ? Thanks, Dan Date: Mon, 5 Feb 2024 16:48:47 +0000 From: Adam Maunder To: Dan Edmunds Subject: Re: Flash now signal Parts/Attachments: 1 OK ~101 lines Text 2 Shown ~193 lines Text ---------------------------------------- - I will make pin #7  a 3V3 CMOS  Flash_Pulse  signal. I understand it to be a normal positive true logic signal, i.e. we will assert it to the +3V3 state to cause a flasher pulse. yes - What should I do with pin #8 (Flash_Pulse_N) ? I can float it or ground it or ?? I would say float it - I understand that it is the Positive going edge of the pin #15  Flash_TDC  signal that we need to time on the main board.  Our TDC only works with positive going edges so we can directly use your Flash_TDC signal without inversion for our TDCs. yes - I believe that all signals, except UART Tx and Rx, are 3V3 CMOS levels. yes - Can you confirm for me which signal: pin # 31 Tx or pin #32 Rx is the UART data coming out of the Interposer ? In my labelling on the interposer the Tx refers to the UART Tx of mainboard and the Rx refers to the UART Rx of the Mainboard. So the data coming out of the ubases would be on pin #32 (Rx), while data going into the ubases for control would be #31 (Tx)