SLAU144K December 2004 – August 2022 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2132-EP , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2252-Q1 , MSP430F2254 , MSP430F2272 , MSP430F2272-Q1 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2201-Q1 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2231-Q1 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430TCH5E
The OA has configurable output selection controlled by the OAADCx bits and the OAFCx bits. The OA output signals can be routed to ADC inputs A12 (OA0), A13 (OA1), or A14 (OA2) internally, or can be routed to these ADC inputs and their external pins. The OA output signals can also be routed to ADC inputs A1 (OA0), A3 (OA1), or A5 (OA2) and the corresponding external pin. The OA output is also connected to an internal R-ladder with the OAFCx bits. The R-ladder tap is selected with the OAFBRx bits to provide programmable gain amplifier functionality.
Table 20-1 shows the OA output and feedback routing configurations. When OAFCx = 0 the OA is in general-purpose mode and feedback is achieved externally to the device. When OAFCx > 0 and when OAADCx = 00 or 11, the output of the OA is kept internal to the device. When OAFCx > 0 and OAADCx = 01 or 10, the OA output is routed both internally and externally.
OAFCx | OAADCx | OA Output and Feedback Routing |
---|---|---|
= 0 | x0 | OAxOUT connected to external pins and ADC input A1, A3, or A5. |
= 0 | x1 | OAxOUT connected to external pins and ADC input A12, A13, or A14. |
> 0 | 00 | OAxOUT used for internal routing only. |
> 0 | 01 | OAxOUT connected to external pins and ADC input A12, A13, or A14. |
> 0 | 10 | OAxOUT connected to external pins and ADC input A1, A3, or A5. |
> 0 | 11 | OAxOUT connected internally to ADC input A12, A13 , or A14. External A12, A13, or A14 pin connections are disconnected from the ADC. |