diff --git a/rtl/eth_mac/apb2axi.md b/rtl/eth_mac/apb2axi.md
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--- a/rtl/eth_mac/apb2axi.md
+++ b/rtl/eth_mac/apb2axi.md
@@ -104,4 +104,19 @@ APB（32位）发起两笔读transaction：
 
 ## 4.2 状态机设计
 
-![alt text](image-6.png)
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+![alt text](image-6.png)
+
+
+# 5 MAC-IP Propramming Guide
+To guide to propram sequences to initialize and manage.
+寄存器配置流程：下配置的核心是：读-修改-写--目的是为了防止覆盖同一寄存器的其他字段；
+实现：使用MASK参数来进行精准定位需修改的位；
+![alt text](image-10.png)
+
+## 5.1 Startup using Standard Alignment Marker Cycle length
+以寄存器配置去bring up 这个800GBASE-R8 KP：
+配置通道0的相关寄存器，然后通过读取状态寄存器0x0010，等待其中指定的9个状态位全部置1，表示通道0已经启动完成。
+![alt text](image-11.png)
+进行适配APB配置时的32bit接口
+![alt text](image-13.png)
+到时候仿axi_read_modify_write()函数，来进行写一个apb_read_modify_write()函数，注意addr、data、mask的取32bit map;
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