User manual

OA Registers
16-13OA
OAxCTL1, Opamp Control Register 1
76543210
OAFBRx OAFCx Reserved OARRIP
rw−0 rw−0 rw−0 rw−0 rw−0 rw−0 rw−0 rw−0
OAFBRx
Bits
7-5
OAx feedback resistor select
000 Tap 0
001 Tap 1
010 Tap 2
011 Tap 3
100 Tap 4
101 Tap 5
110 Tap 6
111 Tap 7
OAFCx
Bits
4-2
OAx function control. This bit selects the function of OAx
000 General purpose
001 Unity gain buffer
010 Reserved
011 Comparing amplifier
100 Non-inverting PGA
101 Reserved
110 Inverting PGA
111 Differential amplifier
Reserved
Bit 1 Reserved
OARRIP
Bit 0 OA rail-to-rail input off.
0 OAx input signal range is rail-to-rail
1 OAx input signal range is limited. See device datasheet for
parameters.