DS125RT410 原理图设计&调试记录2

1. 前言

承接上篇

2. 调试记录

（1）使用默认设置的十六进制文件从E2E另一个帖子，如下
DS125DF410_example_EEPROM

:2000000070001000330000000000000000000000000000000000000000000000000000002D
:200020000000000000000000000000000000000000000000000083D93693AE181800A4F425
:200040006D230C91C50000330039401EE204621F8F99000080004104100200A000C30C10FF
:20006000543018242220A81194A32C3215D75A5D756665A94000000000280000000000003C
:20008000000000000000000000000000000000000000000000000000000000000000000060
:2000A000000000000000000000000000000000000000000000000000000000000000000040
:2000C000000000000000000000000000000000000000000000000000000000000000000020
:2000E000000000000000000000000000000000000000000000000000000000000000000000
:200100000000000000000000000000000000000000000000000000000000000000000000DF
:200120000000000000000000000000000000000000000000000000000000000000000000BF
:2001400000000000000000000000000000000000000000000000000000000000000000009F
:2001600000000000000000000000000000000000000000000000000000000000000000007F
:2001800000000000000000000000000000000000000000000000000000000000000000005F
:2001A00000000000000000000000000000000000000000000000000000000000000000003F
:2001C00000000000000000000000000000000000000000000000000000000000000000001F
:2001E0000000000000000000000000000000000000000000000000000000000000000000FF
:200200000000000000000000000000000000000000000000000000000000000000000000DE
:200220000000000000000000000000000000000000000000000000000000000000000000BE
:2002400000000000000000000000000000000000000000000000000000000000000000009E
:2002600000000000000000000000000000000000000000000000000000000000000000007E
:2002800000000000000000000000000000000000000000000000000000000000000000005E
:2002A00000000000000000000000000000000000000000000000000000000000000000003E
:2002C00000000000000000000000000000000000000000000000000000000000000000001E
:2002E0000000000000000000000000000000000000000000000000000000000000000000FE
:200300000000000000000000000000000000000000000000000000000000000000000000DD
:200320000000000000000000000000000000000000000000000000000000000000000000BD
:2003400000000000000000000000000000000000000000000000000000000000000000009D
:2003600000000000000000000000000000000000000000000000000000000000000000007D
:2003800000000000000000000000000000000000000000000000000000000000000000005D
:2003A00000000000000000000000000000000000000000000000000000000000000000003D
:2003C00000000000000000000000000000000000000000000000000000000000000000001D
:2003E0000000000000000000000000000000000000000000000000000000000000000000FD
:00000001FF

（2）使用I2C expert在I2C总线上以I2C模式搜索设备，
只找到1个RT410(0x30)，找不到2个RT410(0x32)
有什么问题吗

（3） 如果只使用EEPROM的I2C Expert，总共会找到8个地址!这正常吗?

EEPROM是CAT24C08WI-GT3

（4）开机时未进入EEPROM模式(主模式)，且ALL_DONE引脚高，I2C也高

I2C波形如下图所示
时钟:

Data:

目前RT410s到现在还不能用

3. 结论

确认下面重定时器的引脚的硬件设置

EN_SMB
READ_EN_N
addr0, addr1, addr2, addr3

看起来可能在I2C软件GUI中使用了7位寻址
如果是这种情况，则必须相应地映射retimer从地址
例如，SMBus地址0x30在使用7位寻址时对应于0x18

RT410的一个问题，是否支持SAS ?
DS125RT410不支持SAS