Milkv duo v1.2硬件设计问题

Duo
1

milkv duo v1.2板和v1.1板相比增加了spi nand区域，

实拍图
实拍图1920×3413 593 KB

可以看到旁边还有一颗LED和nand焊盘，如果需要nand启动，是需要25/26pin上下拉配合才可实现(MOSI上拉nor，下拉nand)，目前duo-schematic-v1.1.pdf是没有此部分内容的。
web

参考Milk-v/duo_iob_v1.11.pdf看到

spi
spi819×413 55 KB

该部分底板提供了上下拉选择，所以是否v1.2板上是没有任何上下拉电阻的？

那么如此，实际duo板焊上nand芯片，实际使用也会有问题？因为没有看到duo-schematic-v1.2.pdf，duo的原理图是否可以更新？仓库是否可以增加spinor和spinand的的编译选项？

2

你好，duo v.12 的原理图上传在 https://github.com/milkv-duo/hardware/tree/main/Duo 。我去更新一下网页的链接，指向到 github。

3

@setq 我看了下这个， duo-schematic-v1.1.pdfgithub的原理图还是1.1的，1.2为duo的数据手册。

4

@xiaomin 不好意思，之前漏传了，刚才添加了，你看一下 duo-schematic-v1.2.pdf

5

I have already created an option for SPINOR and also SPINAND. But the pads on Duo 1.2 are for SDNAND, not SPI.

6

Yes, I will create a board similar to the Raspberry Pi B for the duo, with SPI NOR (W25Qxx) or SPI NAND (W25N01) options onboard, as they cannot work simultaneously. And comes with usbhub, usb to serial port.

But it needs to be verified before it can be opened source.

PCB_BaseBoardV2.0_pcb_2023-9-25
PCB_BaseBoardV2.0_pcb_2023-9-251920×1244 217 KB

2 Likes
7

A USB-UART bridge is a welcome addition.

8

The USB-UART bridge is designed to connect to the debug serial port through jumper caps, or to any serial port through a dupont cable. At the same time, a WIFI&BT module with a USB interface was added. The total BOM of the entire board core device does not exceed 20RMB, and it is expected to complete the verification and open source after the National Day.