specgather.md

@@ -4,6 +4,8 @@ This wiki page describes different discussion points for the
 specification of the
 SPEC7.
 
+-----
+
 ### Aim and Use cases
 
 #### NIKHEF/JRP, CERN: as high-precision PCIe and stand-alone White Rabbit design
@@ -62,8 +64,45 @@ alternative.
 1.  cost
 2.  performance
 
+-----
+
 ## Under discussion
 
+### FPGA family
+
+  - Xilinx
+  - [Xilinx All Programmable 7 Series Product Selection
+    Guide](https://www.xilinx.com/support/documentation/selection-guides/7-series-product-selection-guide.pdf#k7)
+
+<!-- end list -->
+
+  - Kintex 7
+      - FBG676 package allows 70T, 160T, 325T and 410T sizes on the same
+        footprint.
+            
+          - [XC7K160T-2FBG676C](https://www.eciaauthorized.com/en/search/XC7K160T-2FBG676C)
+            (~260 Euro) (default
+            type?)
+          - [XC7K70T-2FBG676C](https://www.eciaauthorized.com/en/search/XC7K70T-2FBG676C):
+            (~180
+            Euro)
+          - [XC6SLX45T-3FGG484C](https://www.eciaauthorized.com/en/search/XC6SLX45T-3FGG484C)
+            on SPEC: (~84 Euro without STEP pricing)
+          - 8 GTX Transceivers max (4 used for PCIe, 2 for SFP, *only 2
+            left for FMC*).
+              - A 70T in FBG484 package cannot be used as has only 4 GTX
+                Transceivers (No need to check if can be used on
+                footprint of FBG676)
+              - Smallest Kintex7 with 16 GTX transceivers:
+                [XC7K325T-2FBG900C](https://www.eciaauthorized.com/en/search/XC7K325T-2FBG900C)
+                (~1100 Euro)
+
+<!-- end list -->
+
+  - Artix-7
+      - only if LPC
+      - low price
+
 ### FMC HPC or LPC
 
   - use case for HPC?
@@ -97,30 +136,6 @@ Price idea:
       - programmable IC, or just a few values and selection with
         jumpers?
 
-### FPGA family
-
-  - Xilinx
-  - [Xilinx All Programmable 7 Series Product Selection
-    Guide](https://www.xilinx.com/support/documentation/selection-guides/7-series-product-selection-guide.pdf#k7)
-
-<!-- end list -->
-
-  - Kintex 7
-      - FBG676 package allows 70T, 160T, 325T and 410T sizes on the same
-        footprint. 
-          - Default 160T: XC7K160T-2FBG676C ([on
-            ECIAauthorized](https://www.eciaauthorized.com/en/search/XC7K160T-2FBG676C))
-          - 8 GTX Transceivers max (4 used for PCIe, 2 for SFP, 2 left
-            for FMC).
-          - Check if a 70T in FBG484 package can be used on footprint of
-            FBG676 
-
-<!-- end list -->
-
-  - Artix-7
-      - only if LPC
-      - low price
-
 ### SFP
 
   - Double SFP for allowing redundant links?