支持电脑USB转SPI、RS232、RS485、TTL，可以通过板子上的跳线帽选择SPI模式可以给AVR AT89_51系列单片机下载程序，两个SPI插口一个5pin另外一个是10pin(5x2)。
物料表
BOM_usb转232spi485ttl.xlsx
(12.31 KB)
原理图和PCB格式图纸：
USB转换器PCB和SCH文件.zip
(98.57 KB, 售价: 10 工控币)
SPI模式单片机烧写软件及c源码(vc++6工程)
ch341dp_hex.zip
(473.81 KB)
| Comment | Description | Designator | Footprint | LibRef | Quantity | | 20p | Capacitor | C101, C102 | 0805 | CAP | 2 | | 0.47u | Capacitor | C103 | 0805 | CAP | 1 | | 0.01u | Capacitor | C104 | 0805 | CAP | 1 | | 0.1u | Capacitor | C105, C301 | 0805 | CAP | 2 | | 1u | Capacitor | C201, C202, C203, C204, C205 | 0805 | CAP | 5 | | LED_R | | D | LED | LED | 1 | | 1N4148 | Diode | D1, D2 | 1N4148 | DIODE | 2 | | RS232 | | J_232 | DB9/M | DB9 | 1 | | RS485 | Connector | J_485 | J_2 | CON2 | 1 | | ISP | | J_ISP1 | ISP | HEADER 5X2 | 1 | | ISP | Connector | J_ISP2 | CON5 | CON5 | 1 | | POWER | Connector | J_P | J_2 | CON2 | 1 | | CON3 | Connector | J_S | SIP3 | CON3 | 1 | | USART | Connector | J_U | J_2 | CON2 | 1 | | USB_B | Connector | J_USB | USB_B_F | CON4 | 1 | | 1k | | R101 | 0805 | RES1 | 1 | | 120 | | R301 | 0805 | RES1 | 1 | | 300 | | RP | RP2 | HEADER 4X2 | 1 | | CH341A | | U1 | SOP-28 | CH341A | 1 | | MAX232 | | U2 | SO-16 | MAX232 | 1 | | MAX485 | | U3 | SO-8 | MAX485 | 1 | | 12M | Crystal | Y | XTAL1 | CRYSTAL | 1 |
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