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| author | David Shah <davey1576@gmail.com> | 2017-11-13 16:51:28 +0000 |
|---|---|---|
| committer | David Shah <davey1576@gmail.com> | 2017-11-17 15:09:17 +0000 |
| commit | 2f962ac92e018370793b9db3635fabd5b599afef (patch) | |
| tree | 39f28c1dc8cdb9d154ac1384855084727dc21562 /docs | |
| parent | 64e3c1a9cd81e61d9a3b163c9e9f9390fa4c5c21 (diff) | |
| download | icestorm-2f962ac92e018370793b9db3635fabd5b599afef.tar.gz icestorm-2f962ac92e018370793b9db3635fabd5b599afef.tar.bz2 icestorm-2f962ac92e018370793b9db3635fabd5b599afef.zip | |
Fix 5k corner routing, and reverse engineer SPRAM
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/ultraplus.html | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/docs/ultraplus.html b/docs/ultraplus.html index 4220cad..1074862 100644 --- a/docs/ultraplus.html +++ b/docs/ultraplus.html @@ -193,4 +193,28 @@ The <span style="font-family:monospace">CLKLF</span> output of SB_LFOSC is conne <p>SB_LFOSC has no configuration bits.</p> +<h2>SPRAM</h2> +<p>The UltraPlus devices have 1Mbit of extra single-ported RAM, split into 4 256kbit blocks. The full list of connections for each SPRAM block in the 5k device is shown below, + as well as the location of the 1 configuration bit which is set to enable use of that SPRAM block.</p> + + <table class="ctab"> + <tr><th>Signal</th><th>SPRAM (0, 0, 1)</th><th>SPRAM (0, 0, 2)</th><th>SPRAM (25, 0, 3)</th><th>SPRAM (25, 0, 4)</th></tr> + <tr><td>ADDRESS[1:0]</td><td>(0, 2, lutff_[1:0]/in_1)</td><td>(0, 2, lutff_[7:6]/in_0)</td><td>(25, 2, lutff_[1:0]/in_1)</td><td>(25, 2, lutff_[7:6]/in_0)</td></tr> + <tr><td>ADDRESS[7:2]</td><td>(0, 2, lutff_[7:2]/in_1)</td><td>(0, 3, lutff_[5:0]/in_3)</td><td>(25, 2, lutff_[7:2]/in_1)</td><td>(25, 3, lutff_[5:0]/in_3)</td></tr> + <tr><td>ADDRESS[9:8]</td><td>(0, 2, lutff_[1:0]/in_0)</td><td>(0, 3, lutff_[7:6]/in_3)</td><td>(25, 2, lutff_[1:0]/in_0)</td><td>(25, 3, lutff_[7:6]/in_3)</td></tr> + <tr><td>ADDRESS[13:10]</td><td>(0, 2, lutff_[5:2]/in_0)</td><td>(0, 3, lutff_[3:0]/in_1)</td><td>(25, 2, lutff_[5:2]/in_0)</td><td>(25, 3, lutff_[3:0]/in_1)</td></tr> + <tr><td>DATAIN[7:0]</td><td>(0, 1, lutff_[7:0]/in_3)</td><td>(0, 1, lutff_[7:0]/in_0)</td><td>(25, 1, lutff_[7:0]/in_3)</td><td>(25, 1, lutff_[7:0]/in_0)</td></tr> + <tr><td>DATAIN[15:8]</td><td>(0, 1, lutff_[7:0]/in_1)</td><td>(0, 2, lutff_[7:0]/in_3)</td><td>(25, 1, lutff_[7:0]/in_1)</td><td>(25, 2, lutff_[7:0]/in_3)</td></tr> + <tr><td>MASKWREN[3:0]</td><td>(0, 3, lutff_[3:0]/in_0)</td><td>(0, 3, lutff_[7:4]/in_0)</td><td>(25, 3, lutff_[3:0]/in_0)</td><td>(25, 3, lutff_[7:4]/in_0)</td></tr> + <tr><td>WREN</td><td>(0, 3, lutff_4/in_1)</td><td>(0, 3, lutff_5/in_1)</td><td>(25, 3, lutff_4/in_1)</td><td>(25, 3, lutff_5/in_1)</td></tr> + <tr><td>CHIPSELECT</td><td>(0, 3, lutff_6/in_1)</td><td>(0, 3, lutff_7/in_1)</td><td>(25, 3, lutff_6/in_1)</td><td>(25, 3, lutff_7/in_1)</td></tr> + <tr><td>CLOCK</td><td>(0, 1, clk)</td><td>(0, 2, clk)</td><td>(25, 1, clk)</td><td>(25, 2, clk)</td></tr> + <tr><td>STANDBY</td><td>(0, 4, lutff_0/in_3)</td><td>(0, 4, lutff_1/in_3)</td><td>(25, 4, lutff_0/in_3)</td><td>(25, 4, lutff_1/in_3)</td></tr> + <tr><td>SLEEP</td><td>(0, 4, lutff_2/in_3)</td><td>(0, 4, lutff_3/in_3)</td><td>(25, 4, lutff_2/in_3)</td><td>(25, 4, lutff_3/in_3)</td></tr> + <tr><td>POWEROFF</td><td>(0, 4, lutff_4/in_3)</td><td>(0, 4, lutff_5/in_3)</td><td>(25, 4, lutff_4/in_3)</td><td>(25, 4, lutff_5/in_3)</td></tr> + <tr><td>DATAOUT[7:0]</td><td>(0, 1, slf_op_[7:0])</td><td>(0, 3, slf_op_[7:0])</td><td>(25, 1, slf_op_[7:0])</td><td>(25, 3, slf_op_[7:0])</td></tr> + <tr><td>DATAOUT[15:8]</td><td>(0, 2, slf_op_[7:0])</td><td>(0, 4, slf_op_[7:0])</td><td>(25, 2, slf_op_[7:0])</td><td>(25, 4, slf_op_[7:0])</td></tr> + <tr><td><em>SPRAM_ENABLE</em></td><td><em>(0, 1, CBIT_0)</em></td><td><em>(0, 1, CBIT_1)</em></td><td><em>(25, 1, CBIT_0)</em></td><td><em>(25, 1, CBIT_1)</em></td></tr> + </table> + </body></html> |