楼主 #1 2019-11-30 06:55:23 分享评论
- LightElf
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MT7628DAN data?
Hi all!
I am looking for MT7628DAN datasheet/manual/schematic/pinout/etc. Any information can help.
Thanks!
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#2 2019-11-30 08:08:01 分享评论
- win32prog
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Re: MT7628DAN data?
这些资料我觉得 widora.io 应该有.
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#3 2019-11-30 09:22:53 分享评论
- arychen
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Re: MT7628DAN data?
DAN的集成了ddr，我也在找这个。
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#4 2019-11-30 09:29:27 分享评论
- 超级萌新
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Re: MT7628DAN data?
买个MT7628DAN开发板，啥都有了，哈哈哈哈哈哈
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#5 2019-11-30 13:31:12 分享评论
- mango
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Re: MT7628DAN data?
7628DAN没有单独的手册，楼主需要参考7628AN或7688AN的datasheet：
数据手册 https://widora.io/_media/zh/mt7628_datasheet_full.pdf
联发科私有WiFi驱动编程手册 https://widora.io/_media/mtk_wi-fi_softap_software_programming_guide_v4.6.pdf
原理图中DDR参考7688K的，就是相比7688A删掉DDR颗粒电路，务必保留DDR_VREF电路和DDR_VCC的去藕电容。
有一点要提醒下：7688DAN（内置64M） 价格，超过了 7688AN + 128MB工业DDR2颗粒 之和。
最近编辑记录 mango (2019-11-30 13:32:15)
歪朵拉开源硬件： https://widora.cn
淘宝： https://widora.taobao.com/
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楼主 #6 2019-11-30 16:15:21 分享评论
- LightElf
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Re: MT7628DAN data?
mango, great thanks for reply.
Some more questions:
What is the value of DDR_VCC? Is it 1.8V as usual for DDR2?
Is some termination needed for address/data pins or I can just leave it unconnected?
What is operating temperature range for MT7628DAN? Is it industrial?
For the number of reasons 7688AN+DDR2 chip is not a good option for my purposes.
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#7 2019-11-30 17:31:16 分享评论
- mango
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Re: MT7628DAN data?
mango, great thanks for reply.
Some more questions:
What is the value of DDR_VCC? Is it 1.8V as usual for DDR2?
Is some termination needed for address/data pins or I can just leave it unconnected?
What is operating temperature range for MT7628DAN? Is it industrial?
For the number of reasons 7688AN+DDR2 chip is not a good option for my purposes.
Yes,1.8V, just use 7688 LDO(in chip) power it.
no need any termination ,just leave it float.
Ambient temperature: -20 ~ +55 ℃
MediaTek's agent said that the chip shipment is not large, so the price is not very satisfactory.
歪朵拉开源硬件： https://widora.cn
淘宝： https://widora.taobao.com/
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楼主 #8 2019-12-01 17:46:17 分享评论
- LightElf
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Re: MT7628DAN data?
Yes,1.8V, just use 7688 LDO(in chip) power it.
no need any termination ,just leave it float.
Thanks! Seems like I got enough information to start my design. 
Ambient temperature: -20 ~ +55 ℃
Generally speaking, this is not so bad.
MediaTek's agent said that the chip shipment is not large, so the price is not very satisfactory.
Yes, MT7628/7688 slightly outdated now, 1000Mbit LAN is a requirement now for most applications. I don't speak for WiFi,
as it "no-no" for industrial usage.
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