71M6542F-IGT/F Maxim Integrated Products, 71M6542F-IGT/F Datasheet - Page 130
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71M6542F-IGT/F
Manufacturer Part Number
71M6542F-IGT/F
Description
PMIC Solutions Precision Energy Meter IC
Manufacturer
Maxim Integrated Products
Type
Metering SoCr
Datasheet
1.71M6541F-DB.pdf
(165 pages)
Specifications of 71M6542F-IGT/F
Core
8051
Core Architecture
8051
Data Bus Width
8 bit
Data Ram Size
5 KB
Device Million Instructions Per Second
5 MIPS
Interface Type
I2C, ICE, SPI, UART
Maximum Clock Frequency
5 MHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Number Of Programmable I/os
51
Number Of Timers
2
On-chip Adc
22 bit
Operating Supply Voltage
3 V to 3.6 V
Package / Case
LQFP-100
Processor Series
8051
Program Memory Size
64 KB
Program Memory Type
Flash
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
71M6542F-IGT/F
Manufacturer:
AD
Quantity:
1 500
interrupt. They remain constant throughout each accumulation interval. In this data sheet, the names of
CE transfer variables always end with “_X”. The transfer variables can be categorized as:
•
•
•
5.3.8.1 Fundamental Energy Measurement Variables
Table 85
variables are signed 32-bit integers. Accumulated variables such as WSUM are internally scaled so they
have at least 2x margin before overflow when the integration time is one second. Additionally, the hardware
does not permit output values to fold back upon overflow.
Address
When the MPU receives the XFER_BUSY interrupt, it knows that fresh data is available in the transfer
variables. CE transfer variables are modified during the CE code pass that ends with an XFER_BUSY
Note:
†
Address
Note:
†
WSUM_X (CE RAM 0x84) and VARSUM_X (CE RAM 0x88) are the signed sum of Phase-A and Phase-B Wh
or VARh values according to the metering equation specified in the I/O RAM control field EQU[2:0] (I/O
RAM 0x2106[7:5]). WxSUM_X (x = 0 or 1, CE RAM 0x85 and 0x86) is the Wh value accumulated for phase x
in the last accumulation interval and can be computed based on the specified LSB value.
130
71M6542 only.
71M6542 only.
0x84
0x88
0x84
0x88
0x8A
0x8A
0x85
0x86
0x89
0x85
0x86
0x89
CE
CE
Fundamental energy measurement variables
Instantaneous (RMS) values
Other measurement parameters
†
†
†
†
and
VAR0SUM_X
VAR1SUM_X
VAR0SUM_X
VAR1SUM_X
VARSUM_X
VARSUM_X
W0SUM_X
W1SUM_X
W0SUM_X
W1SUM_X
Table 86
WSUM_X
WSUM_X
Name
Name
describe each transfer variable for fundamental energy measurement. All
Table 86: CE Transfer Variables (with Remote Sensor)
Table 85: CE Transfer Variables (with Local Sensors)
© 2008–2011 Teridian Semiconductor Corporation
The signed sum: W0SUM_X+W1SUM_X. Not used
for EQU[2:0] = 0 (I/O RAM 0x2106[7:5]) and
EQU[2:0] = 1.
The sum of Wh samples from each wattmeter
element.
The signed sum: VAR0SUM_X+VAR1SUM_X. Not
used for EQU[2:0] = 0 and EQU[2:0] = 1.
The sum of VARh samples from each wattmeter
element.
The signed sum: W0SUM_X+W1SUM_X. Not used
for EQU[2:0] = 0 (I/O RAM 0x2106[7:5]) and
EQU[2:0] = 1.
The sum of Wh samples from each wattmeter
element.
The signed sum: VAR0SUM_X+VAR1SUM_X. Not
used for EQU[2:0] = 0 and EQU[2:0] = 1.
The sum of VARh samples from each wattmeter
element.
LSB
LSB
LSB = 1.55124*10
LSB = 1.55124*10
W
W
= 9.4045*10
= 9.4045*10
Description
Description
-12
-12
-13
-13
* VMAX* IMAX Wh.
*VMAX* IMAX VARh.
* VMAX * IMAX Wh.
* VMAX * IMAX VARh.
Figure 35
Figure 37
Figure 36
Figure 38
Configuration
Configuration
(page 93)
(page 95)
(page 94)
(page 96)
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