71M6541D-IGT/F Maxim Integrated Products, 71M6541D-IGT/F Datasheet - Page 96

• Manufacturer Part Number: 71M6541D-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6541D-IGT/F

• Core: 8051
• Core Architecture: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 3 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: 30
• Number Of Timers: 2
• On-chip Adc: 22 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Package / Case: LQFP-64
• Processor Series: 8051
• Program Memory Size: 32 KB
• Program Memory Type: Flash
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

sensor. For best performance, the IAP-IAN current sensor input is configured for differential mode (i.e.,
DIFFA_E = 1, I/O RAM 0x210C[4]). The 71M6x01 Isolated Sensor Interface is used to isolate phase B. The
outputs of the 71M6x01 Isolated Sensor Interface are routed through a pulse transformer, which is
connected to the pins IBP-IBN. The IBP-IBN pins must be configured for remote sensor communication
(i.e., RMT_E =1, I/O RAM 0x2709[3]). See
4.6
Figure 38
96
PHASE A
71M6542F Using 71M6x01 and Current Shunts
shows a typical two-phase connection for the 71M6542F using one isolated and one non-isolated
TERIDIAN
71M6XX1
Shunt
NEUTRAL
Trans-
former
Pulse
HOST
AMR
PHASE B
IR
Figure 38: 71M6542F with 71M6x01 Isolated Sensor
© 2008–2011 Teridian Semiconductor Corporation
Shunt
NEUTRAL
IAP
IAN
SPI INTERFACE
SERIAL PORTS
MODUL-
POWER FAULT
PHASE A
IBP
IBN
COMPARATOR
VB
VA
MUX and ADC
ATOR
TX
RX
Figure 5
VREF
TX
RX
LOAD
LOAD
for the AFE configuration corresponding to
TEMPERATURE
V3P3A V3P3SYS
TERIDIAN
71M6542F
COMPUTE
MEMORY
ENGINE
SENSOR
TIMERS
FLASH
MPU
RAM
RTC
ICE
POWER SUPPLY
Note:
This system is referenced to PHASE A
GNDA GNDD
OSCILLATOR/
REGULATOR
DIO, PULSES
LCD DRIVER
VBAT_RTC
PWR MODE
CONTROL
BATTERY
MONITOR
WAKE-UP
COM0...5
SEG/DIO
PLL
VBAT
V3P3D
XOUT
SEG
DIO
XIN
BATTERY
RTC
BATTERY
8888.8888
LCD DISPLAY
32 kHz
I
2
EEPROM
PULSES,
C or µWire
Figure
DIO
38.
v1.1