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MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
30
Maxim Integrated
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
XXXX
—
No measurement.
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
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
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
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.