Poseidon
From LinuxMIPS
PR31500, Poseidon v1.0
PR31500 is a 40MHz R3000 3.3V static CMOS CPU with R3000A TLB and 4K Instrution / 1K Data cache. PR31500 also contains multi-channel DMA controller, ROM, Flash, RAM, DRAM, SDRAM, SRAM, and PCMCIA controller and Dual-UART, SPI and High-speed serial interface controllers.
http://www-us2.semiconductors.philips.com/pip/PR31500.html
PR31700, Poseidon v1.5
The PR31700 is a 75MHz R3000 (PR3901 Processor Core) with MMU, 4K Instruction / 1K Data cache. PR31700 also contains multi-channel DMA controller, ROM, Flash, RAM, DRAM, SDRAM, SRAM, and PCMCIA controller.
