Texas Instruments MSP430x1xx BCSCTL2, Basic Clock System Control Register, SELMx, DIVMx, DIVSx

Basic Clock Module Registers

BCSCTL2, Basic Clock System Control Register 2

7 6 5 4

3 2 1 0

SELMx

DIVMx

SELS

DIVSx

DCOR

rw−(0) rw−(0) rw−(0) rw−(0) rw−0 rw−0 rw−0 rw−0

SELMx	Bits	Select MCLK. These bits select the MCLK source.
	7-6	00	DCOCLK
		01	DCOCLK

10XT2CLK when XT2 oscillator present on-chip. LFXT1CLK when XT2 oscillator not present on-chip.

11LFXT1CLK

DIVMx	BitS	Divider for MCLK
	5-4	00	/1
		01	/2
		10	/4
		11	/8
SELS	Bit 3	Select SMCLK. This bit selects the SMCLK source.

0DCOCLK

1XT2CLK when XT2 oscillator present on-chip. LFXT1CLK when XT2 oscillator not present on-chip.

DIVSx	BitS	Divider for SMCLK
	2-1	00	/1
		01	/2
		10	/4
		11	/8
DCOR	Bit 0	DCO resistor select
		0	Internal resistor
		1	External resistor

4-16Basic Clock Module