Fem is composed of pa chip and lna chip, the difference between the two is as follows:
A, the main body is different
1, pa chip: the first chip model for the PA-8000, the main frequency of 180MHz, and then successively introduced PA-8200, PA-8500 and PA-8600 and other models.
2
2, lna chip: on-chip integration of the MAC (media layer) and PHY (physical layer) following the SMSC/CD protocol, in line with the IEEE802.3/802.U-100Base-Tx/10Base-T specification.
Two, different configurations
1, pa chip: the processor is designed to achieve a main frequency of 800MHz or more. pa-8700 uses a process of 0.18 micron SOI copper CMOS process, using seven layers of copper conductor interconnect, the high-speed into the cache on the chip reaches 2.25MB.
2, lna chip: a single chip high-speed USB 2.0 10/100 Ethernet Controller Integrated 10/100 Ethernet MAC with full duplex support Integrated 10/100 MAC/PHY with HP Auto-MDIX support Integrated USB 2.0 Hi-Speed Device Controller.
Three, the characteristics of different
1, pa chip: with virtual storage architecture, unified data format, floating-point computing, multimedia and graphics acceleration and so on.
2, lna chip: low-power mode 11 GPIO support bus-powered and self-powered mode of operation integrated power-on reset circuit external 3.3v I/O power supply built-in 1.8v core power regulator.
Baidu Encyclopedia-PA-RISC
Baidu Encyclopedia-LAN9500