Mostrar código-fonte de MediaTek MT7620

The MediaTek MT7620A / MT7620N are Wi-Fi System-On-Chips (WiSOC) is typically used in [[access point]] and [[router]] platforms.

==Common specifications==
* CPU architecture: MIPS 24KEc <small>(RT6352)</small>
* 802.11n 2T/2R (2x2:2) 2.4GHz 300Mbps MAC/BB/PA/RF FEM
* SPI Flash support
* integrated 6-port Ethernet switch <small>(MT7530)</small> with five 10/100 PHYs
* supports '''Ralink''' / '''MTK''' HW_NAT v2
* Additional interfaces: USB 2.0 (1x, host/client), I2C
* JTAG is muxed with GPIO (see the datasheet, requires a different bootstrapping configuration)

===Features===
*MIPS24KEc 580/600 MHz w/ 64 KB I-Cache and 32 KB D-Cache
*2T2R 802.11n 2.4GHz w/ MAC/BBP/RF FEM
:Support external PA/LNA
*16-bit SDR/DDR1/DDR2 up to 256 Mbytes
*SPI, NAND Flash, SDXC, eMMC
*USB2 Host/Device, PCIe Host/Device
:I2C, UART (2x), JTAG, GPIO
*5port FE SW + RGMII (2x)
*Audio interface (I2S, PCM)
*HW storage accelerator
*2Gbps IPv4/6 routing, NAT, NAPT
*OS: Linux 2.6.36 SDK, OpenWrt, eCos
*iNIC Driver (RGMII/PCIe): Linux 2.4/2.6
*2L PCB for N300 (MT7620N)
:MT7620A: full functions in TFBGA package
:MT7620N: N300 mainly in DRQFN package

==Part numbers and notable differences==

===MediaTek MT7620N===
* Package: DR-QFN 148pin, 12x12mm
* Clocked @580/600/620MHz ([http://forum.ixbt.com/topic.cgi?id=14:58757:948#948 Padavan posts]) <!-- (rev. 0203°, 0205) [http://forum.ixbt.com/topic.cgi?id=14:58757-2#28] 
clock freq. is more or less commonly known more information on chip revision would be desirable if there is anything other than minor HW errata fixes -->
:CPU_PLL = (40 000 000 * PLL_MULT_RATIO) / PLL_DIV_RATIO
:PLL_DIV_RATIO = 2, DDR RAM = CPU_PLL/3, CONFIG_RALINK_MT7620_PLL600

:580MHz: PLL_MULT_RATIO = 29 / 385.02 BogoMIPS (lpj=770048) / RBUS 193MHz / DDR 385MHz
:600MHz: PLL_MULT_RATIO = 30 / 397.82 BogoMIPS (lpj=795648) / RBUS 200MHz / DDR 400MHz
:620MHz: PLL_MULT_RATIO = 31 / 410.62 BogoMIPS (lpj=821248) / RBUS 207MHz / DDR 415MHz

:System Tick Counter = 50KHz (Sleep Mode support), SSC (Spread Spectrum Clock)
:CONFIG_RALINK_CPUSLEEP_AND_SYSTICK_COUNTER=y

*SDRAM / DDR1 / DDR2 RAM}} (64MB/512Mb max.) support
:SDRAM: CPU:SYS = 4, DDR1/DDR2: CPU:SYS = 3

*no RGMII - usable with 5 switched FE ports
*Wireless network: 2.4GHz 802.11n MIMO 2x2:2
*Wireless chip: MediaTek RT5390 (int. SoC)
*Ethernet switch: MediaTek MT7530 (int. SoC)

===MediaTek MT7620A===
* Package: TFBGA 265 ball, 11x11mm
* Clocked @ 580 MHz<!-- [http://forum.ixbt.com/topic.cgi?id=14:58757-2#28]
clock freq. is more or less commonly known -->
* DDR2 RAM (256MB/2Gbit max.) and NAND Flash support
* 2x RGMII - usable with 5 switched FE ports + RGMII or 
:4 switched FE ports and 2x RGMII, among other modes
* Additional interfaces: PCIe (1x), SDHC, PCM, I2S

*Wireless network: 2.4GHz 802.11n MIMO 2x2:2
*Wireless chip: MediaTek RT5390 (int. SoC)
*Ethernet switch: MediaTek MT7530 (int. SoC)

==Drivers==
* This chip is supported by recent versions of [https://openwrt.org/tag/mt7620?do=showtag&tag=mt7620 OpenWrt] distribution, with open-source driver
* [https://github.com/WRTnode OpenWrt distribution on '''GitHub'''] (binary wireless driver)
* [https://github.com/wuqiong/rt2860v2-for-openwrt-mt7620 Wi-Fi driver on '''GitHub'''] (non-GPL Ralink/Mediatek SDK driver)

*'''2.7.1.5''' Ralink
:*RT3092 - PCIe (2.4 GHz)
:*RT3390 - PCIe (2.4 GHz)
:*RT5392 - PCIe (2.4 GHz)
:*RT3593 - PCIe (2.4/5 GHz)
:*RT5592 - PCIe (2.4/5 GHz)
*'''2.7.1.6''' / '''2.7.2.0''' Ralink
:*RT3052 - APSoC RBUS (2.4 GHz)
:*RT3352 - APSoC RBUS (2.4 GHz)
:*RT5350 - APSoC RBUS (2.4 GHz)
:*RT3662 - APSoC RBUS (2.4/5 GHz)
:*RT3883 - APSoC RBUS (2.4/5 GHz)
:*'''MT7620'''A/N - APSoC RBUS (2.4 GHz)
*'''3.0.0.9''' MediaTek
:*MT7610E - PCIe (2.4/5 GHz)
*'''3.0.4.0''' MediaTek
:(MT76x2E_MT7620_LinuxAP_V3.0.4.0_DPA_20150630)
:(MT76x2e_MT7620_LinuxAP_V3.0.4.0.P1_DPA_20150910)
:*MT7602E - PCIe (2.4 GHz)
:*MT7612E - PCIe (2.4/5 GHz)
:*'''MT7620'''A/N - APSoC RBUS (2.4 GHz)
::(MT76x2e_MT7620_LinuxAP_V3.0.4.0_DPA_20150617) [http://dl.openwrtdl.com dl]
*'''4.0.1.0''' MediaTek
:(MT7603e_LinuxAP_V4.0.1.0rev1_DPA_20150629)
:(ANDES microcode - production version 20150624)
:*MT7603E - PCIe/MT_MAC (2.4 GHz)
::(MT7603e_LinuxAP_V4.0.1.0rev1_DPA_20150629) [http://dl.openwrtdl.com dl]
*'''4.0.1.3''' MediaTek
:*[http://www.mediatek.com/en/products/connectivity/wifi/home-network/wifi-ap/mt7615/ MT7615] - APSoC MT_MAC (1x 4T4R/2x 2T2R 2.4/5GHz)
::(MT7615_LinuxAP_V4.4.0.1_20151231_144753) [http://dl.openwrtdl.com dl]
:*[http://www.mediatek.com/en/products/connectivity/wifi/home-network/wifi-ap/mt7628kna/ MT7628] - APSoC RBUS/MT_MAC (2T2R 2.4GHz)
::(MT7628-STA-4.0.1.4) [http://dl.openwrtdl.com dl]
:*[http://www.mediatek.com/en/products/connectivity/wifi/home-network/wifi-ap/mt7688ka/ MT7688] - APSoC RBUS/MT_MAC (1T1R 2.4GHz)	 
*'''4.4.1.0''' MediaTek
:(MT7615_LinuxAP_V4.4.1.0_20160701)
:*[http://www.mediatek.com/en/products/connectivity/wifi/home-network/wifi-ap/mt7615/ MT7615E] - APSoC MT_MAC (2.4/5 GHz)
::SB mode: 4T4R 802.11ac 5GHz (BW160)
::DBDC mode: 2T2R 2.4GHz + 2T2R 5GHz
:*MT7621AT/MT7615EN - ASUS RT-AC85U

== Links ==
* [https://mediatek.com/products/homeNetworking/mt7620n-a  MediaTek MT7620]
* [http://www.mediatek.com/en/products/connectivity/wifi/home-network/wifi-ap/mt7620na/ Product page]
* [http://en.techinfodepot.shoutwiki.com/wiki/MediaTek_MT7620#Devices_using_MT7620A_.2F_MT7620N Devices using MT7620A / MT7620N]
* [http://anz.ru/files/mediatek/MT7620_Datasheet.pdf '''MediaTek''' MT7620 Datasheet] ([https://wiki.microduino.cn/images/3/34/MT7620_Datasheet.pdf ''Mirror''])
* [http://anz.ru/files/mediatek/MT7620_ProgrammingGuide.pdf '''MediaTek''' MT7620 Programming Guide]
* [https://m.87994.com/read/acb7ecf74cbbc48333ddaeca628786859bf09011.html MediaTek Wireless Roadmap 2013]

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