Question:
I compiled Version 1.28m AY-AT Color and enabled the External reference. The Selftest or Show Values show Vref=1088 and not my entered Value of 2498.
Am I missing something?
*
* 2.5V voltage reference for Vcc check
* - default pin: PC4 (ATmega 328)
* - should be at least 10 times more precise than the voltage regulator
* - see TP_REF for port pin (config-<MCU>.h)
* - uncomment to enable and also adjust UREF_25 below for your voltage
* reference
*/
#define HW_REF25
/*
* Typical voltage of 2.5V voltage reference (in mV)
* - see datasheet of the voltage reference
* - or use >= 5.5 digit DMM to measure the voltage
*/
#define UREF_25 2498
Also when I place a short between Pins 1 and 2 it measures 0 ohms
, when I place a short between Pins 2 and 3 it measures 0 ohms
but when I place a short between pins 1 and 3 it measures 20pf between pins 2 and 3.
I changed the Crystal to 20MHz