Rainbow Electronics W90N745CDG - Manual (Page 6)

W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
- 1 - Revision A2
1. GENERAL DESCRIPTION
The W90N745 is built around an outstanding CPU core, the 16/32 ARM7TDMI RISC processor which
designed by Advanced RISC Machines, Ltd. It offers 4K-byte I-cache/SRAM and 4K-byte D-
cache/SRAM, is a low power, general purpose integrated circuits. Its simple, elegant, and fully static
design is particularly suitable for cost sensitive and power sensitive applications.
One 100/10 Mbit MAC of Ethernet controller is built-in to reduce total system cost.
The W90N745 also provides one USB 1.1 host controller, one USB 1.1 device controller, one
AC97/I²S controller, one 2-channel GDMA, four independent UARTs, one watchdog timer, two 24-bit
timers with 8-bit pre-scale, up to 31 programmable I/O ports, PS2 keyboard controller and an
advanced interrupt controller. The external bus interface (EBI) controller provides for SDRAM,
ROM/SRAM, flash memory and I/O devices. The system manager includes an internal 32-bit system
bus arbiter and a PLL clock controller.
With a wide range of serial communication and Ethernet interfaces, the W90N745 is suitable for
communication gateways as well as many other general purpose applications.