Rainbow Electronics MAX1464 - Manual (Page 30)

MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
30 ______________________________________________________________________________________
BITS NAME DESCRIPTION
15–12 — Unused.
11–8 SE[3:0] Single-ended signal source multiplexer. SE[3] = MSB.
7–3 — Unused.
2 CNVT1
1 = Initiate conversion on channel 1 using ADC settings specified in registers ADC_Config_1A and
ADC_Config_1B. The ADC result is stored in ADC_Data_1. CPU is halted during the conversion
process. This bit is automatically reset to zero when conversion is completed.
1 CNVT2
1 = Initiate conversion on channel 2 using ADC settings specified in registers ADC_Config_2A and
ADC_Config_2B. The ADC result is stored in ADC_Data_2. CPU is halted during the conversion
process. This bit is automatically reset to zero when conversion is completed.
0 CNVTT
1 = Initiate conversion on temperature sensor using ADC settings specified in registers
ADC_Config_TA and ADC_Config_TB. The ADC result is stored in ADC_Data_T. CPU is halted during
the conversion process. The bit is automatically reset to zero when conversion is completed.
Table 5. ADC_Control (Address = 00h)
CNVT1 CNVT2 CNVTT SE[3:0]
RESULT
DATA_n
DESCRIPTION
0 0 0 XXXX — No measurement.
0 0 1 0000 T
Convert the temperature sensor signal using the settings in
ADC_Config_TA and ADC_CONFIG_TB, storing the result in the
ADC_Data_T register.
0 1 X 0000 2
Convert the differential signal INP2-INM2 using the settings in
ADC_Config_2A and ADC_Config_2B, storing the result in the ADC_Data_2
register.
1 X X 0000 1
Convert the differential signal INP1-INM1 using the settings in
ADC_Config_1A and ADC_Config_1B, storing the result in the ADC_Data_1
register.
0 0 1 bbbb* — Not used for any setting of SE[3:0] ≠ 0000.
0 1 X bbbb* 2
Convert the single-sided signal indicated by SE[3:0] using the settings in
ADC_Config_2A and ADC_Config_2B, if appropriate, storing the result in
the ADC_Data_2 register.
1 X X bbbb* 1
Convert the single-sided signal indicated by SE[3:0] using the settings in
ADC_Config_1A and ADC_Config_1B, if appropriate, storing the result in
the ADC_Data_1 register.
Table 6. Initiate Conversion (CNVT1, CNVT2, CNVTT)
*The value bbbb is any nonzero single-ended setting.