ICEE-SPI-debug最好用 SPI 和 JTAG 或更优的(高达104MHz的)SPI通信保障飞速的debug响应；不再像UART的115200 BaudRate ~

S25FL032P : 32-Mbit CMOS 3.0 Volt Flash Memory with 104-MHz SPI (Serial Peripheral Interface) Multi I/O Bus
SPANSION

Zentel SDRAM;

https://www.zerodayinitiative.com/blog/2019/9/2/mindshare-hardware-reversing-with-the-tp-link-tl-wr841n-router

https://openwrt.org/toh/tp-link/tl-wr841nd

TL-WRN841N

• V7:
  • CPU: AR7241-AH1A(400 MHz),
  • Flash: Eon EN25F32-100HIP,
  • RAM:Zentel A3S56D40ETP-G5
  • USB-Serial
    Atheros AR9287-BL1A 2.4GHz 802.11bgn

Community builds
OpenWrt 19.07 ath79 tiny, including LuCI, see this forum thread.
Over 500 days
The TP-Link TL-WRN841N(D) running over 500 days on an Enterprise Level