Texas Instruments MSP430x4xx Family User Manual page 658

OA Registers in FG42x0 Devices
OAxCTL0, Opamp Control Register 0
7 6
OANx
rw−0 rw−0
OANx Bits
7−6
OAPx Bits
5−4
OAPMx Bits
3−2
Reserved Bits
1−0
22-20 OA
5 4
OAPx
rw−0 rw−0
Inverting input select
These bits select the input signal for the OAx inverting input.
00 OAxI1
01 OAxI2
10 DAC internal
11 VSS
Non-inverting input select
These bits select the input signal for the OAx non-inverting input.
00 OAxI0
01 OA0I0
10 DAC internal
11 VSS
Slew rate select
These bits select the slew rate vs. current consumption of the OAx.
00 Off, output high Z
01 Slow
10 Medium
11 Fast
Reserved
3 2
OAPMx Reserved
rw−0 rw−0
1 0
Reserved
rw−0 rw−0