The 4D Programming Cable is a USB to Serial-TTL UART converter cable. It incorporates the Silabs CP2102 USB to Serial UART bridge IC (as used in the uUSB-MB5 module) which handles all the USB signalling and protocols. The cable provides a fast and simple way to connect all of the 4D devices that require TTL level serial interface to USB. The Programming Cable is also an essential hardware tool used for programming PmmC files and 4DGL user code downloads into the GOLDELOX and PICASO processors embedded in many 4D modules.
The cable contains a small internal electronic circuit board, utilising the CP2102 chip and special RESET circuitry, which is encapsulated into the USB connector at the end of the cable. The cable is RoHS compliant and is available with a 5pin female header (0.1"/2.54mm pitch) at TTL levels of 3.3V for RX and TX. The 5pin header is labeled with the appropriate signal names: +5V, RX, TX, GND, RESET which match the programming headers on the 4D devices. The cable also provides +5V DC supply to power up the target device. The cable is 1m in length and the circuitry is USB powered (USB 2.0 compliant full speed @ 12Mbps) and supports data rates from 300bps to 1Mbps.
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I got this cable because I owned a uLCD-43 Picaso display that I'd bought a few years back with the intention of making a standalone system operated by a touch screen display. The screen didn't come with this cable, which I found out was necessary to program the device from my PC. The cable is working for it's intended purpose. I haven't tried using a different USB to UART solution. I'm still curious to know if it would work.