11.5.1 Main Clock Control A
Name: | MCLKCTRLA |
Offset: | 0x00 |
Reset: | 0x00 |
Property: | Configuration Change Protection |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
CLKOUT | CLKSEL[1:0] | ||||||||
Access | R/W | R/W | R/W | ||||||
Reset | 0 | 0 | 0 |
Bit 7 – CLKOUT System Clock Out
When
this bit is written to '1
', the system clock is output to the
CLKOUT pin. The
CLKOUT pin is available for devices with 20 pins or more. See section 5.1 Multiplexed Signals, for more information.
Bits 1:0 – CLKSEL[1:0] Clock Select
This bit field selects the source for the Main Clock (CLK_MAIN).
Value | Name | Description |
---|---|---|
0x0 | OSC20M | 16 MHz internal oscillator |
0x1 | OSCULP32K | 32.768 kHz internal ultra low-power oscillator |
0x2 | XOSC32K | 32.768 kHz external crystal oscillator |
0x3 | EXTCLK | External clock |