在使用有源晶振的情况下OSC_OUT可否作为IO使用？

只看该作者 · 2013-1-30 14:37

从下文可以看出 PD0/PD1 是同时REMAP的，因此OSC_OUT不可作为IO使用,当OSC_IN做振荡入时。

Bit 15 PD01_REMAP: Port D0/Port D1 mapping on OSC_IN/OSC_OUT
This bit is set and cleared by software. It controls the mapping of PD0 and PD1 GPIO
functionality. When the HSE oscillator is not used (application running on internal 8 MHz RC)
PD0 and PD1 can be mapped on OSC_IN and OSC_OUT. This is available only on 36-, 48-
and 64-pin packages (PD0 and PD1 are available on 100-pin and 144-pin packages, no
need for remapping).
0: No remapping of PD0 and PD1
1: PD0 remapped on OSC_IN, PD1 remapped on OSC_OUT,