Rainbow Electronics MAX5961 - Manual (Page 24)

MAX5961
0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
24 ______________________________________________________________________________________
Minimum and Maximum Value Detection
for Current Measurement Values
All current measurement values from the ADC are con-
tinuously compared with the contents of minimum- and
maximum-value registers, and if the most recent mea-
surement exceeds the stored maximum or is less than
the stored minimum, the corresponding register is
updated with the new value. These “peak detection”
registers are read/write accessible through the I
2 C
interface (Tables 13–16). The minimum-value registers
are reset to 0x3FF, and the maximum-value registers
are reset to 0x000. These reset values are loaded upon
startup of a channel or at any time as commanded by
register peak_log_rst (Table 36).
Table 11. Overcurrent Warning Threshold Register Format (High-Order Bits)
Description: Overcurrent warning threshold, high-order bits [9:2]
Register Titles: oc_ch1_h oc_ch2_h oc_ch3_h oc_ch4_h
Register Addresses: 0x3A 0x44 0x4E 0x58
R/W R/W R/W R/W R/W R/W R/W R/W
RESET
VALUE
oc_9 oc_8 oc_7 oc_6 oc_5 oc_4 oc_3 oc_2 0xFF
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Table 12. Overcurrent Warning Threshold Register Format (Low-Order Bits)
Description: Overcurrent warning threshold, low-order bits [1:0]
Register Titles: oc_ch1_l oc_ch2_l oc_ch3_l oc_ch4_l
Register Addresses: 0x3B 0x45 0x4F 0x59
R/W R/W R/W R/W R/W R/W R/W R/W
RESET
VALUE
oc_1 oc_0 0x03
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Table 13. ADC Minimum Current Conversion Register Format (High-Order Bits)
Description: Minimum current conversion result, high-order bits [9:2]
Register Titles: min_ch1_cs_h min_ch2_cs_h min_ch3_cs_h min_ch4_cs_h
Register Addresses: 0x10 0x18 0x20 0x28
R/W R/W R/W R/W R/W R/W R/W R/W
RESET
VALUE
imin_9 imin_8 imin_7 imin_6 imin_5 imin_4 imin_3 imin_2 0xFF
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0