1 AMD am186
1.1 am186cu
am186 runs 8086 instruction set. am186cc means communications controller, am186cu means communications USB.
Only the USB data endpoints can be used with the SmartDMA controller. Endpoint A must be configured for OUT data on SmartDMA Channel 2 (receive), while Endpoint B must be configured for IN data on the SmartDMA Channel 2 (transmit). Endpoint C must be configured for OUT on Channel 3 (receive), and Endpoint D must be IN on Channel 3 (transmit). Depending on the application, the appropriate endpoint should be chosen.
1.2 am186ESLV
am186ESLV means 16-Bit Embedded SRAM Low-Voltage.
2 Cypress EZ USB
2.1 EZ-USB Endpoint Buffers
EZ-USB Technical Reference Manual page 31
Figure 1-17. EZ-USB Endpoint Buffers
TI TAS1020B（TI Audio Solutions）每个端点的双buffer分别称为X Buffer和Y Buffer。
2.2 Timer
EZ-USB FX2LP 16bit Timer2支持下降沿捕获功能，分频系数只有4和12。
参考page 199。
2.3 showcase
chinde-d300: Cypress CY7C68013A
3 CH569 USBSS
Refer to LINK_IRQHandler() of CH569 USBSS. I think it's based on Daisho USB.
USBHS: 0x4000_9000
USBSS: 0x4000_8000
https://www.wch.cn/downloads/CH569EVT_ZIP.html
4 Host MP3
MVSILICON 2006, Rohm 2007, Sunplus 2006.
Chery QQ: MB95F16BJA, BU72432KV
Toshiba USB host T5CJ3, used in CD player.