add mega 138k chip information

docs/hardware/zh/tang/tang-mega-138k/mega-138k.md

@@ -0,0 +1,90 @@
+---
+title: Tang Mega 20K
+keywords: FPGA, Tang, Mega, 20K
+update:
+  - date: 2023-06-29
+    version: v0.1
+    author: wonder
+    content:
+      - 新建文档
+---
+
+
+## 芯片参数
+
+<table>
+    <tbody>
+        <tr>
+            <td>型号</td>
+            <td>GW5AST-138</td>
+        </tr>
+        <tr>
+            <td>逻辑单元(LUT4)</td>
+            <td>138,240</td>
+        </tr>
+        <tr>
+            <td>寄存器(REG)</td>
+            <td>138,240</td>
+        </tr>
+        <tr>
+            <td>分布式静态随机存储器SSRAM(Kbits)</td>
+            <td>1,080</td>
+        </tr>
+        <tr>
+            <td>块状静态随机存储器BSRAM(Kbits)</td>
+            <td>6,120</td>
+        </tr>
+        <tr>
+            <td>块状静态随机存储器数目BSRAM(个)</td>
+            <td>340</td>
+        </tr>
+        <tr>
+            <td>DSP</td>
+            <td>298</td>
+        </tr>
+        <tr>
+            <td>最多锁相环(PLLs)</td>
+            <td>12</td>
+        </tr>
+        <tr>
+            <td>全局时钟</td>
+            <td>16</td>
+        </tr>
+        <tr>
+            <td>高速时钟</td>
+            <td>24</td>
+        </tr>
+        <tr>
+            <td>Transceivers</td>
+            <td>8</td>
+        </tr>
+        <tr>
+            <td>Transceivers 速率</td>
+            <td>270Mbps-12.5Gbps</td>
+        </tr>
+        <tr>
+            <td>PCIE 硬核</td>
+            <td>1,<br>x1, x2, x4, x8 PCIe 2.0</td>
+        </tr>
+        <tr>
+            <td>LVDS (Gbps)</td>
+            <td>1.25</td>
+        </tr>
+        <tr>
+            <td>DDR3 (Mbps)</td>
+            <td>1,333</td>
+        </tr>
+        <tr>
+            <td>MIPI D-PHY硬核</td>
+            <td>2.5Gbps（RX），<br>8个数据通道，<br>2个时钟通道</td>
+        </tr>
+        <tr>
+            <td>硬核处理器</td>
+            <td>RiscV AE350_SOC</td>
+        </tr>
+        <tr>
+            <td>ADC</td>
+            <td>2</td>
+        </tr>
+    </tbody>
+</table>