38.11.3 ADCCON2 – ADC Control Register 2

This register controls the reference selection for the ADC module, the sample time for the shared ADC module, interrupt enable for reference, early interrupt selection and clock division selection for the shared ADC.

Name:	ADCCON2
Offset:	0x1410
Reset:	0x00000000
Property:	-


Bit	31	30	29	28	27	26	25	24
	BGVRRDY	REFFLT	EOSRDY				SAMC[9:8]
Access	R/HS/HC	R/HS/HC	R/HS/HC				R/W	R/W
Reset	0	0	0				0	0


Bit	23	22	21	20	19	18	17	16
	SAMC[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	BGVRIEN	REFFLTIEN	EOSIEN		ENXCNVRT
Access	R/W	R/W	R/W		R/W
Reset	0	0	0		0


Bit	7	6	5	4	3	2	1	0
		ADCDIV[6:0]
Access		R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset		0	0	0	0	0	0	0

Bit 31 – BGVRRDY Band Gap Voltage/ADC Reference Voltage Status bit

Data processing is valid only after BGVRRDY is set by hardware, so the application code must check that the BGVRRDY bit is set to ensure data validity. This bit set to ‘0’ when ON (ADCCON1[15]) = 0.

Value	Description
0	Either or both band gap voltage and ADC reference voltages (V_REF) are not ready
1	Both band gap voltage and ADC reference voltages (V_REF) are ready

Bit 30 – REFFLT Band Gap/V_REF/A_VDD BOR Fault Status bit

This bit is cleared when the ON bit (ADCCON1[15]) = 0 and the BGVRRDY bit = 1.

Value	Description
0	Band gap and V_REF voltage are working properly
1	Fault in band gap or the V_REF voltage while the ON bit (ADCCON1[15]) was set. Most likely a band gap or V_REF fault is caused by a BOR of the analog V_DDsupply.

Bit 29 – EOSRDY End of Scan Interrupt Status bit

This bit is cleared when ADCCON2[31:24] are read in software.

Value	Description
0	Scanning has not completed
1	All analog inputs are considered for scanning through the scan trigger (all analog inputs specified in the ADCCSS1 and ADCCSS2 registers) have completed scanning

Bits 25:16 – SAMC[9:0] SampleTime for the Shared ADC (ADC2) bits

Where T_AD7 = Period of the ADC conversion clock for the Shared ADC (ADC2) controlled by the ADCDIV[6:0] bits.

Value	Description
1111111111	1025 T_AD7
...
0000000001	3 T_AD7
0000000000	2 T_AD7

Bit 15 – BGVRIEN Band Gap/V_REF Voltage Ready Interrupt Enable bit

Value	Description
0	No interrupt is generated when the BGVRRDY bit is set
1	Interrupt is generated when the BGVRDDY bit is set

Bit 14 – REFFLTIEN Band Gap/V_REF Voltage Fault Interrupt Enable bit

Value	Description
0	No interrupt is generated when the REFFLT bit is set
1	Interrupt is generated when the REFFLT bit is set

Bit 13 – EOSIEN End of Scan Interrupt Enable bit

Value	Description
0	No interrupt is generated when the EOSRDY bit is set
1	Interrupt is generated when the EOSRDY bit is set

Bit 11 – ENXCNVRT Enable External Conversion Request Interface

Setting this bit enables another module (such as the PTG) to specify and request conversion of an ADC input.

Note: The external module (such as the PTG) is responsible for asserting only the proper trigger signals. This ADC module has no method to block specific trigger requests from the external module.