Rainbow Electronics MAX5970 - Manual (Page 29)

0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
MAX5970
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Table 35. ADC Maximum Voltage Conversion Register Format (Low-Order Bits)
Table 36. Peak-Detection Reset-Control Register Format
Table 37. Peak-Detection Hold-Control Register Format
Using the Voltage and Current
Peak-Detection Registers
The voltage and current minimum- and maximum-value
records in register locations 0x08 through 0x17 can be
reset by writing a 1 to the appropriate location in register
peak_log_rst (see Table 36). The minimum-value regis-
ters are reset to 0x3FF, and the maximum-value registers
are reset to 0x00.
As long as a bit in peak_log_rst is 1, the corresponding
peak-detection registers are disabled and are cleared
to their power-up reset values. The voltage and current
minimum- and maximum-detection register contents
for each signal can be held by setting bits in register
peak_log_hold (see Table 37). Writing a 1 to a location
in peak_log_hold locks the register contents for the cor-
responding signal and stops the min/max detection and
logging; writing a 0 enables the detection and logging.
Note that the peak-detection registers cannot be cleared
while they are held by register peak_log_hold.
The combination of these two control registers allows the
user to monitor voltage and current peak-to-peak values
during a particular time period.
Description: Maximum voltage conversion result, low-order bits [1:0]
Register Title: max_ch0_mon_lsb max_ch1_mon_lsb
Register Addresses: 0x0F 0x13
R R R R R R R/W R/W
RESET
VALUE
vmax_1 vmax_0 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Description: Reset control bits for peak-detection registers
Register Title: peak_log_rst
Register Address: 0x41
R R R R R/W R/W R/W R/W
RESET
VALUE
— — — — Ch1_v_rst Ch1_i_rst Ch0_v_rst Ch0_i_rst 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Description: Hold control bits for peak-detection registers; per signal
Register Title: peak_log_hold
Register Address: 0x42
R R R R R/W R/W R/W R/W
RESET
VALUE
— — — — Ch1_v_hld Ch1_i_hld Ch0_v_hld Ch0_i_hld 0x00
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0