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John McMaster ba57c749c5 bram_fixed minitest: early BRAM testing 
Signed-off-by: John McMaster <johndmcmaster@gmail.com>
 		2018-10-23 13:23:50 -07:00
..
.gitignore bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
Makefile bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
README.txt bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
env.sh bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
runme.sh bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
runme.tcl bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_CLKARDCLK_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_CLKBWRCLK_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_ENARDEN_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_ENBWREN_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_RAM_MODE_SDP.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_RSTRAMARSTRAM_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_RSTRAMB_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_RSTREGARSTREG_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_RSTREGB_INV.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_WRITE_MODE_A_NC.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_WRITE_MODE_A_RF.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00
top_ref.v bram_fixed minitest: early BRAM testing 2018-10-23 13:23:50 -07:00

README.txt 

Some quick tests to understand BRAM configuration
Written before segments were fully developed, so this preliminary writeup is a bit coarse

Basically all the RAMB36 configuration tests show two bit flips
This indicates that RAMB18 and RAMB36 are fully indepdnently configurable
SDP vs TDP was a lot more complicated, needs more investigation

Note: tested on a7 after sourcing env.sh. k7 would likely also work


Raw data

set_property LOC RAMB36_X0Y21 [get_cells ram]

design_CLKARDCLK_INV.bits
  < bit_0002031b_013_11
  < bit_0002031b_016_21

design_CLKBWRCLK_INV.bits
  < bit_0002031b_013_13
  < bit_0002031b_016_19

design_CLKARDCLK_INV.bits
  < bit_0002031b_013_11
  < bit_0002031b_016_21

design_CLKBWRCLK_INV.bits
  < bit_0002031b_013_13
  < bit_0002031b_016_19

design_ENARDEN_INV.bits
  < bit_0002031b_013_16
  < bit_0002031b_016_16

design_ENBWREN_INV.bits
  < bit_0002031b_013_19
  < bit_0002031b_016_13

design_RSTRAMARSTRAM_INV.bits
  < bit_0002031b_013_20
  < bit_0002031b_016_12

design_RSTRAMB_INV.bits
  < bit_0002031b_013_21
  < bit_0002031b_016_11

design_RSTREGARSTREG_INV.bits
  < bit_0002031b_013_24
  < bit_0002031b_016_08

design_RSTREGB_INV.bits
  < bit_0002031b_013_27
  < bit_0002031b_016_05

design_WRITE_MODE_A_NC.bits
  > bit_0002031b_012_00
  > bit_0002031b_018_00

design_WRITE_MODE_A_RF.bits
  > bit_0002031b_011_24
  > bit_0002031b_018_08

TDP vs SDP probably does routing changes, leading to a lot of bit flips
design_RAM_MODE_SDP.bits
  > bit_00020282_010_05
  > bit_00020284_010_06
  < bit_00020289_010_04
  < bit_0002028f_010_04
  > bit_00020300_014_11
  < bit_00020300_016_27
  > bit_00020300_016_25
...etc