Rainbow Electronics MAX5970 - Manual (Page 23)

0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
MAX5970
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Digital Voltage Monitoring and
Power-Good Outputs
The voltage at the load (MON_ inputs) is sampled by
the internal ADC. The MON_ full-scale voltage for each
channel can be set to 16V, 8V, 4V, or 2V by writing to
register mon_range. The default range is 16V (Tables
17 and 18).
Table 17. ADC Voltage Monitor Settings Register Format
Table 18. ADC Full-Scale Voltage Setting
Table 19. ADC Voltage Conversion Result Register Format (High-Order Bits)
Table 20. ADC Voltage Conversion Result Register Format (Low-Order Bits)
The most recent voltage conversion results can be read
from the adc_chx_mon_msb and adc_chx_mon_lsb reg-
isters (see Tables 19 and 20).
Description: ADC voltage monitor full-scale range settings (for MON_ inputs)
Register Title: mon_range
Register Addresses: 0x18
R/W R/W R/W R/W R/W R/W R/W R/W
RESET
VALUE
— — — — MON2_rng1 MON2_rng0 MON1_rng1 MON1_rng0 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
MONx_rng1 MONx_rng0 ADC FULL-SCALE VOLTAGE (V)
0 0 16
0 1 8
1 0 4
1 1 2
Description: Most recent voltage conversion result, high-order bits [9:2]
Register Title: adc_ch0_mon_msb adc_ch1_mon_msb
Register Addresses: 0x02 0x06
R R R R R R R R
RESET
VALUE
vnew_9 vnew_8 vnew_7 vnew_6 vnew_5 vnew_4 vnew_3 vnew_2 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Description: Most recent voltage conversion result, low-order bits [1:0]
Register Title: adc_ch0_mon_lsb adc_ch1_mon_lsb
Register Addresses: 0x03 0x07
R R R R R R R R
RESET
VALUE
vnew_1 vnew_0 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0