2.5.1.1 AT32UC3L064 Pinout for the RTC Clock

Table 2-13. UC3L Pinout for the 32kHz Crystal Connections
QFP48 pinGPIOGPIO Alternate FunctionsFeature
26PA13N.A. XIN32_232kHz crystal input
25PA20N.A. XOUT32_232kHz crystal output