Intel eSPI
Enhanced Serial Peripheral Interface(eSPI), 用来代替之前的LPC（Low Pin Count Interface）
- 工作在1.8V
- Better bandwidth and performance: 50MHz, 64~256B payload vs. 4B for LPC
- 更少的管脚数: ～15～20 pin reduction compared to LPC solution
eSPI 与 LPC 比较
LPC
链接百度文库：LPC总线介绍
LPC 由7根必选信号以及6根可选信号组成
Communication over LPC
eSPI
链接豆丁网：eSPI
eSPI: Enhanced SPI， interface between SOC/PCH and EC/SIO/BMC,用来替代LPC/SMBUS/PECI,工作在1.8v,工作频率10～66MHz
Communication over eSPI
Skylake eSPI/PLC
- Pin List
- Specification List
- Performance Compare
Reference：
[1]: IOTG_Purley_Snapshot_2017ww26.pdf
[2]: IOTG_Purley_Design_In.pdf
[3]: https://wenku.baidu.com/view/22dc31ed844769eae009edf5.html
[4]: http://www.docin.com/p-2060537856.html