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FLL+ Clock Module Registers
4-15FLL+ Clock Module
FLL_CTL1, FLL+ Control Register 1
76543210
Unused
SMCLK
OFF
†
XT2OFF
†
SELMx
†
SELS
†
FLL_DIVx
r0 r0 rw−(1) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)
† Not present in MSP430x41x, MSP430x42x devices.
Unused
Bit 7
SMCLKOFF
Bit 6 SMCLK off. This bit turns off SMCLK. Not present in MSP430x41x,
MSPx42x devices.
0 SMCLK is on
1 SMCLK is off
XT2OFF
Bit 5 XT2 off. This bit turns off the XT2 oscillator. Not present in MSP430x41x,
MSPx42x devices.
0 XT2 is on
1 XT2 is off if it is not used for MCLK or SMCLK.
SELMx
Bits
4−3
Select MCLK. These bits select the MCLK source. Not present in
MSP430x41x, MSP430x42x devices.
00 DCOCLK
01 DCOCLK
10 XT2CLK
11 LFXT1CLK
SELS
Bit 2 Select SMCLK. This bit selects the SMCLK source. Not present in
MSP430x41x, MSP430x42x devices.
0 DCOCLK
1 XT2CLK
FLL_DIVx
Bits
1−0
ACLK divider
00 /1
01 /2
10 /4
11 /8