71M6545 Datasheet, PDF (16/134 Pages) Maxim Integrated Products – Four-Quadrant Metering, Phase Metrology Processors Flash/RAM Size

Data Sheet 71M6545/H
PDS_6545_009
Table 2. Required CE Code and Settings for CT Sensors
I/O RAM
Mnemonic
FIR_LEN[1:0]
ADC_DIV
PLL_FAST
MUX_DIV[3:0]
MUX0_SEL[3:0]
MUX1_SEL[3:0]
MUX2_SEL[3:0]
MUX3_SEL[3:0]
MUX4_SEL[3:0]
MUX5_SEL[3:0]
MUX6_SEL[3:0]
MUX7_SEL[3:0]
MUX8_SEL[3:0]
MUX9_SEL[3:0]
MUX10_SEL[3:0]
RMT2_E
RMT4_E
RMT6_E
DIFF0_E
DIFF2_E
DIFF4_E
DIFF6_E
PRE_E
EQU[2:0]
I/O RAM
Location
210C[2:1]
2200[5]
2200[4]
2100[7:4]
2105[3:0]
I/O RAM Setting
(Hex)
1
0
1
7
2
2105[7:4]
8
2104[3:0]
4
2104[7:4]
9
2103[3:0]
6
2103[7:4]
A
2102[3:0]
0
2102[7:4]
0
2101[3:0]
0
2101[7:4]
0
2100[3:0]
0
2709[3]
0
2709[4]
0
2709[5]
0
210C[4]
1
210C[5]
1
210C[6]
1
210C[7]
1
2704[5]
0
2106[7:5]
5
Comments
288 cycles
Fast
19.66 MHz
See note 1
Slot 0 is IADC2-IADC3
(IA)
Slot 1 is VADC8
(VA)
Slot 2 is IADC4-IADC5
(IB)
Slot 3 is VADC9
(VB)
Slot 4 is IADC6-IADC7
(IC)
Slot 5 is VADC10
(VC)
Slot 6 is IADC0-IADC1
(IN – See note 2)
Slots not enabled
Local Sensor IADC2-IADC3
Local Sensor IADC4-IADC5
Local Sensor IADC6-IADC7
Differential IADC0-IADC1
Differential IADC2-IADC3
Differential IADC4-IADC5
Differential IADC6-IADC7
IADC0-IADC1 Gain = 1
IA*VA + IB*VB + IC*VC
CE Code
Equation(s)
Current Sensor Type
Applicable Figures
Notes:
ce43a02
5
4 Current Transformers (CTs)
Figure 3 and Figure 28
1. MUX_DIV[3:0] should be set to 0 while writing the other values in this table, and then set to
the indicated value before writing the MUXn_SEL[3:0] fields.
2. IN is the optional Neutral Current
TERIDIAN updates the CE code periodically. Please contact your local TERIDIAN representative
to obtain the latest CE code and the associated settings.
Using settings for the I/O RAM Mnemonics listed in Table 1 and Table 2 that do not match
those required by the corresponding CE code being used may result in undesirable side
effects and must not be selected by the MPU. Consult your local TERIDIAN representative to
obtain the correct CE code and AFE / MUX settings corresponding to the application.
For a poly-phase configuration with neutral current sensing using shunt resistor current sensors and the
71M6xx3 isolated sensors, as shown in Figure 2, the IADC0-IADC1 input must be configured as a
differential input, to be connected to a local shunt (see Figure 26 for the shunt connection details). The
local shunt connected to the IADC0-IADC1 input is used to sense the Neutral current. The voltage
sensors (VADC8, VADC9 and VADC10) are also directly connected to the 71M6545/H (see Figure 23 for
16
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