Another thing you can do (if you can spare the pin) is to run the normal xtal oscillator on the first chip, feed the raw 12MHz (before the PLL) out of one of the pins that pinmuxes as CLK_GPOUTx and then feed that pin to XIN on the second RP2xxxx
Example for RP2040 using GPIO25:
Example for RP2040 using GPIO25:
Code:
#define PIN_12MHZ_OUT25... clock_gpio_init(PIN_12MHZ_OUT, CLOCKS_CLK_GPOUT3_CTRL_AUXSRC_VALUE_XOSC_CLKSRC, 1);Statistics: Posted by arg001 — Sat Apr 05, 2025 10:19 am