estratos
Junior Member level 2
Similar to this user:
https://www.edaboard.com/threads/210881/
I'm having problems with a custom FT232RL board. I've designed lots of FT232-based boards in the past, but always with an additional LDO to power my MCU from Vbus (5V). This time I want the FT232RL to power my MCU from its internal 3.3V LDO but voltage at the VCCIO and 3V3OUT pins is higher than that:
With my MCU board unplugged: VCCIO = 3.3VOUT = 4.1 V
With my MCU board plugged: VCCIO = 3.3VOUT = 3.8 V
Apart from this issue, the board is working well (USB comms, UART comms, LED's, etc).
This is my circuit:
100nF decoupling capacitors are close to VCCIO and 3V3OUT pins. Additionally, I've tried placing some other values like 10uF and 1uF but nothing changes.
Thanks guys for your feedback!
https://www.edaboard.com/threads/210881/
I'm having problems with a custom FT232RL board. I've designed lots of FT232-based boards in the past, but always with an additional LDO to power my MCU from Vbus (5V). This time I want the FT232RL to power my MCU from its internal 3.3V LDO but voltage at the VCCIO and 3V3OUT pins is higher than that:
With my MCU board unplugged: VCCIO = 3.3VOUT = 4.1 V
With my MCU board plugged: VCCIO = 3.3VOUT = 3.8 V
Apart from this issue, the board is working well (USB comms, UART comms, LED's, etc).
This is my circuit:
100nF decoupling capacitors are close to VCCIO and 3V3OUT pins. Additionally, I've tried placing some other values like 10uF and 1uF but nothing changes.
Thanks guys for your feedback!
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