[ci skip] Update readme.md

Author: ckormanyos

readme.md

@@ -403,12 +403,13 @@ features a bare-metal startup _without_ using any of the SDK.
 The bare-metal startup was taken from the work of
 [Chalandi/Baremetal_esp32s3_nosdk](https://github.com/Chalandi/Baremetal_esp32s3_nosdk).
 The dual-core system first boots core0 which subsequently
-starts up core1 and also starts up the RISC-V coprocessor core.
+starts up core1 and also starts up the RISCV coprocessor core.
 Blinky runs in the standard `ref_app`
 on core0 toggling `port7` while an endless timer loop on core1
 toggles `port6`. The LED ports togle in near unison at $\frac{1}{2}~\text{Hz}$.
 Self-procured LEDs and resistors need to be fitted in order to observe
-blinky on this particular board.
+blinky on this particular board. The RISCV coprocessor
+toggles `port17` at a randomly chosen frequency around $\frac{2}{3}~\text{Hz}$
 
 The NXP(R) OM13093 LPC11C24 board ARM(R) Cortex(R)-M0+ configuration
 called `target lpc11c24` toggles the LED on `port0.8`.