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| Boot pull up/down resistors https://www.8devices.com/community/viewtopic.php?f=22&t=1132 |
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| Author: | jtbeck [ 20 Jun 2018, 11:52 ] |
| Post subject: | Boot pull up/down resistors |
Hi, I am using the Rambutan UART but have to interface to 1.8V logic. I would like to simply use a resistor dividor to reduce the 2.5V transmit signal to the 1.8V however this means I am pulling down on the otherwise pulled up signal. The transmitter pin (19) is a boot H pin. Can you tell me the resistor pull up value in the module? I don't want to put a whole level translator chip in to make the level change if I don't have to. Any other suggestions? Thanks, JB |
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| Author: | gedass [ 20 Jun 2018, 14:00 ] |
| Post subject: | Re: Boot pull up/down resistors |
19 UART_TX (GPIO_10) Bootstrap L via 10K to GND |
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