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interfaces:cp2102 [2020/08/05 04:54] darron [Pickle Microchip PIC ICSP] |
interfaces:cp2102 [2020/08/19 09:35] 127.0.0.1 external edit |
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Transmit is labelled RXD and receive as TXD on this module. | Transmit is labelled RXD and receive as TXD on this module. | ||
- | The device appears to be a genuine cp2102. | + | === CJMCU module === |
- | === CJMCU module (not pictured yet) === | + | This module |
- | + | 4v4 on their output pins instead of 3v3. This module is totally | |
- | This module | + | |
- | than the on-chip VREG being 3V3 these boards output 4.3V | + | |
- | or 4.4V on their output pins. This module is totally | + | |
unreliable at 460800 baud. | unreliable at 460800 baud. | ||
+ | |||
+ | A source on the web explains that the RESET pin is incorrectly | ||
+ | pulled high to VUSB. | ||
+ | |||
+ | === 6 in 1 USB to TTL RS232 USB TTL to RS485 === | ||
+ | |||
+ | There is lot going on here and none has been tested. A diagram exists | ||
+ | explaining the switches. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | < | ||
+ | Mode Pin Function | ||
+ | TTL Level Interface TXD TTL Transmit | ||
+ | TTL Level Interface RXD TTL Receive | ||
+ | TTL Level Interface GND TTL ground | ||
+ | 232 Level Interface 232-TX 232 Transmit | ||
+ | 232 Level Interface 232-RX 232 Receive | ||
+ | 232 Level Interface GND 232 Ground | ||
+ | 485 Level Interface A 485A+ | ||
+ | 485 Level Interface B 485B- | ||
+ | +5V Voltage Output +5V +5V Voltage Output | ||
+ | 3.3 Voltage Output 3V3 3.3V Voltage Output | ||
+ | DTR Output DTR Special Function | ||
+ | RTS Output RTS Special Function | ||
+ | </ | ||
=== Linux === | === Linux === |