Rainbow Electronics MAX5961 - Manual (Page 26)

MAX5961
0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
26 ______________________________________________________________________________________
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).
The most recent voltage conversion results can be read
from the adc_chx_mon_h and adc_chx_mon_l registers
(see Tables 19 and 20).
Table 17. ADC Voltage Monitor Settings Register Format
Description: ADC voltage monitor full-scale range settings (for MON_ inputs)
Register Titles: mon_range
Register Addresses: 0x30
R/W R/W R/W R/W R/Wxxx R/W R/W R/W
RESET
VALUE
MON4_rng1 MON4_rng0 MON3_rng1 MON3_rng0 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
Table 19. ADC Voltage Conversion Result Register Format (High-Order Bits)
Description: Most recent voltage conversion result, high-order bits [9:2]
Register Titles: adc_ch1_mon_h adc_ch2_mon_h adc_ch3_mon_h adc_ch4_mon_h
Register Addresses: 0x02 0x06 0x0A 0x0E
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
Table 20. ADC Voltage Conversion Result Register Format (Low-Order Bits)
Description: Most recent voltage conversion result, low-order bits [1:0]
Register Titles: adc_ch1_mon_l adc_ch2_mon_l adc_ch3_mon_l adc_ch4_mon_l
Register Addresses: 0x03 0x07 0x0B 0x0F
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
Table 18. ADC Full-Scale Voltage Setting
MONx_rng1 MONx_rng0 ADC FULL-SCALE VOLTAGE (V)
0 0 16
0 1 8
1 0 4
1 1 2