ISL28022_15 Datasheet, PDF (14/32 Pages) Intersil Corporation – Precision Digital Power Monitor

REGISTER
ADDRESS (HEX)
REGISTER NAME
00
Configuration
01
Shunt Voltage
02
Bus Voltage
03
Power
04
Current
05
Calibration Register
06
Shunt Voltage Threshold
07
Bus Voltage Threshold
08
DCS Interrupt Status
09
Aux Control Register
ISL28022
TABLE 2. ISL28022 REGISTER DESCRIPTIONS
FUNCTION
POWER-ON RESET VALUE
(HEX)
Power-on reset, bus and shunt ranges, ADC
acquisition times, mode configuration
799F
Shunt voltage measurement value
0000
Bus voltage measurement value
0000
Power measurement value
0000
Current measurement value
0000
Register used to enable current and power
measurements.
0000
Min/Max shunt thresholds
7F81
Min/Max V_BUS thresholds
Threshold interrupts
FF00
0000
Register to control the interrupts and
external clock functionality
0000
ACCESS
R/W
R
R
R
R
R/W
R/W
R/W
R/W
R/W
TABLE 3. CONFIGURATION REGISTER
BIT D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4 D3
D2
D1
D0
NAME RST BRNG1 BRNG0 PG1 PG0 BADC3 BADC2 BADC1 BADC0 SADC3 SADC2 SADC1 SADC0 MODE2 MODE1 MODE0
Register Descriptions
Table 2 is the register map for the device. The table describes the
function of each register and its respective value. The addresses
are sequential and the register size is 16 bits (2 bytes) per
address.
CONFIGURATION REGISTER
The configuration register (Table 3) controls the functionality of
the chip. ADC measurable range, converter acquisition times,
converter resolution and state machine modes are configurable
bits within this register.
RST: Reset Bit
Configuring the reset bit (Bit15) to a 1 generates a system reset
that initializes all registers to their default values and performs a
system calibration.
BRNG: Bus Voltage Range
Bits 13 and 14 of the configuration register sets the bus
measurable voltage range. Table 4 shows the BRNG bit
configurations versus the allowable full-scale measurement
range. The shaded row is the power-up default.
BRNG1
0
0
1
1
TABLE 4. BRNG BIT SETTINGS
BRNG0
USABLE FULL
SCALE RANGE (V)
0
16
1
32
0
60
1
60
PG: PGA (Shunt Voltage Only)
Bits 11 and 12 of the configuration register determines the shunt
voltage measurement range. Table 5 shows the PGA bit
configurations versus the allowable full-scale measurement
range. The shaded row is the power-up default.
TABLE 5. PGA BIT SETTINGS
PG1
PG0
GAIN
0
0
1
0
1
÷2
1
0
÷4
1
1
÷8
RANGE
(mV)
±40
±80
±160
±320
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FN8386.7
October 2, 2015