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9.13.14 ADC12_B

The ADC12_B module supports fast 12-bit analog-to-digital conversions with differential and single-ended inputs. The module implements a 12-bit SAR core, sample select control, a reference generator, and a conversion result buffer. A window comparator with lower and upper limits allows CPU-independent result monitoring with three window comparator interrupt flags.

Table 9-18 lists the external trigger sources.

Table 9-18 ADC12_B Trigger Signal Connections

ADC12SHSx		CONNECTED TRIGGER SOURCE
BINARY	DECIMAL	CONNECTED TRIGGER SOURCE
000	0	Software (ADC12SC)
001	1	TA0 CCR1 output
010	2	TB0 CCR0 output
011	3	TB0 CCR1 output
100	4	TA1 CCR1 output
101	5	TA2 CCR1 output
110	6	TA3 CCR1 output
111	7	TA4 CCR1 output

Table 9-19 lists the available multiplexing between internal and external analog inputs.

Table 9-19 ADC12_B External and Internal Signal Mapping

CONTROL BIT IN ADC12CTL3 REGISTER	EXTERNAL ADC INPUT (CONTROL BIT = 0)	INTERNAL ADC INPUT (CONTROL BIT = 1)
ADC12BATMAP	A31	Battery monitor
ADC12TCMAP	A30	Temperature sensor
ADC12CH0MAP	A29	N/A⁽¹⁾
ADC12CH1MAP	A28	N/A⁽¹⁾
ADC12CH2MAP	A27	N/A⁽¹⁾
ADC12CH3MAP	A26	N/A⁽¹⁾

(1) N/A = No internal signal is available on this device.