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LC-TTL-CH341A
CH341A USB to UART/IIC/SPI/TTL/ISP Adapter EPP/MEM Parallel
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Defective devices (not electronic components) are (according to the manufacturer's warranty) exchanged or repaired.
Overview
LC CH341A USB conversion module equipped with CH341A chip, CH341A is a USB bus adapter chip, through the USB bus to provide asynchronous serial port, parallel port, print and 2 line and 4 line common synchronous serial interface, the module can be used for serial expansion, I2C interface EEPROM，SPI interface FLASH and STC MCU programming, program debugging, data acquisition, brush machine etc.
Function features
1.Support USB to parallel printer port and EPP or MEM parallel port
2.Support USB to UART, I2C, SPI interface
3.The output voltage and the signal level can be selected by 3.3V or 5V
4.Have UART and SPI/I2C working status indicator light
Hardware introduction and description
1.Board size: 45*27mm
2.Board function description
(1)Interface description
● VCC, RXD, TXD, GND: UART interface
● VCC, SDA, SCL, GND: I2C interface
● MISO,MOSI,SCK,CS2,CS1,CS0,GND,VCC: SPI interface
● The 10P_2.54mm pin is print port and EPP/MEM port, pin’s definition can refer to manual
(2)Work mode ( jumper cap on the right of USB)
①UART model: the jumper cap is inserted into the UART, the D2 indicator light (blue) on;
②I2C/SPI and EPP/MEM parallel mode: the jumper cap is inserted into the I2C/SPI, the D1 indicator light (red) on;
③The printer parallel port mode: the need to unplug the jumpers，and SDA and SCL connected together.
The output voltage of VCC and signal level selection (2 jumper cap on the left of USB):
When the 2 jumper cap is inserted into the 3V3 side is 3.3V; when the 2 jumper cap also plug to the other side is 5V.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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