ASUS WL-520GU
The Asus WL-520gu seemed like an attractive router. It boasted OpenWRT support, USB 2.0, a serial port, and most importantly: a low price. What we actually received was a lesson in “don't believe what you see”.
Hardware
System-On-Chip
The CPU used onboard is a Boradcom System On Chip BCM5354KFBG. It is capable of 240MHz according to Broadcom however, it operates at roughly 233MHz on the WL-520GU. It includes a 802.11b/g transceiver as well as a 5 port 10/100 Ethernet switch. The chip supports two individual UARTs as well as one USB2.0 chip.
Memory
Onboard, the router has 16MB of SRAM (Samsung K4S281632I). There is a possibility of upgrading to a larger module at a later point in time.
Flash size is limited to 4MB which makes the system very constrained in terms of room for software.
Peripherals
Other peripherals that have been found on the board are:
- SiGe 2528L RF Power Amplifier
- External RPSMA Antenna Connector
- Internal PCB antenna
- Analog RF Switch
- 3.3V Regulator
- 5V Regulator
- 4 Pin header providing access to a single (1) Serial Port
