I still have a few LPC2103 (ARM7TDMI @70MHz) and CH563 (ARM926EJ-S @130MHz) in my parts bin. Should I keep hanging on to them? Should I keep a few of them on breadboard adapter boards?
LPC2103 doesn't have much special features other than a few UARTs, SPI, I2C and timers.
CH563 supports built-in Ethernet PHY, USB, audio ADC, external bus interface and parallel slave port, along with the standard set of UARTs, SPI, I2C and timers.
p.s. I bought a few TPS2375. Couple those to my PoE MagJack and 48V-5V isolated DC-DC modules I can implement PoE. Should I try to build a board with CH563 + PoE, or should I just go directly to STM32F107/217/756 + DP83848/RTL8201 + PoE?