Nechip主要技术特点：

■内核: ARM 32-bit ARM7TDMI

–*高支持*70MHZ

0.9DMIPS/MHz (Dhrystone 2.1)

performance at 0 wait state memory access

– Single-cycle multiplication and hardwaredivision

■存储系统

–片上集成256k/512k字节FLASH,32k字节boot区

–*256KB SRAM

–外部内存扩展接口,16位数据总线和24位地址总线,支持*SRAM/PSRAM/*R存储器

■串行接口

–支持*5路*串口且每路串口带DMA操作

–支持硬件流控

–支持软件流控

■协议族：

Ethernet: Version 2.0/IEEE 802.3
ARP, UDP/IP, TCP/IP, PING/ICMP, DHCP, BOOTP, Auto IP,TFTP, SNTP ,TELNET ,HTTP，
DNS,SMTP, PPP, LCP, PAP, CHAP, *P, PPPoE
SSL/TLS,HTTPS ,SNMP(Optional)
FTP Server/Client (Optional)

■以太网接口

–集成 10/100M MAC + PHY with DMA  

– Support auto sensing or user mode under,100M Full/Half Duplex,10M Ful /Half Duplex

–硬件TCP/IP 加速器

■SDIO/SPI

–支持通过SDIO/SPI口直接扩展*嵌入式WIFI(WLAN)模块

–支持扩展SD/MMC卡

■低功耗

– Sleep, S* and Standby modes

– Regular / high speed mode switch

■时钟，电源

–*一颗25M的晶体或OSC即可立即工作

Internal PLL to 60/70MHZ

–单电源供电:

3.2 - 3.45V

MARK: Some models may require another 1.8V Power supply for core