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MSP430 Ultra-Low Power 16-bit Microcontroller Forum
ADC10_A channel A12
Where is the ADC10_A channel # A12 mapped to? or how?
I could not find it in MSP430x5xx/MSP430x6xx FamilyUser's Guide (SLAU208J), nor in the MSP430 Datasheet of MSP430F550x
thx for reply
Take another look at the datasheet. Especially Table 1: Family members. In teh ADC10 column, you'll only find members with 6 or 10 external channels. So only A0 to A9 are externall mapped. A10 and A11 are internal and the rest is simply not present.
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Thanks for reply.
There was a mistake in my queston, I am interested in the internal channel #11, which is only shown in slau208j Figure 25-1. ADC10_A Block Diagram. The channel is assigned to Batt.Monitor. I should know what it is exactly, because there are multiple supply pins on the chip. And how it is assigned (e.g. resistor divider). I could not find more about this channel. Does somebody know more?
thanks for reply
Soem MSPs have a backup battery module. There a BAKADC bit can be set and will route Vbatt/2 to the ADC. So you can measure the state of the backup battery.On ADC12, channel 11 usually reads VCC/2.
I don't know whether there is actually an MSP with battery backup and ADC12.
It is possible that on MSPs without battery backup system, channel 11 of the ADC10 also reads VCC/2.
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