71M6543F-IGT/F Maxim Integrated Products, 71M6543F-IGT/F Datasheet - Page 26

• Manufacturer Part Number: 71M6543F-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6543F-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

71M6543F/H and 71M6543G/GH Data Sheet
2.3.4 Meter Equations
The 71M6543 provides hardware assistance to the CE in order to support various meter equations. This
assistance is controlled through I/O RAM field EQU[2:0] (equation assist, I/O RAM 0x2106[7:5]). The
Compute Engine (CE) firmware configurations can implement the equations listed in
specifies the equation to be used based on the meter configuration and on the number of phases used for
metering.
2.3.5 Real-Time Monitor (RTM)
The CE contains a Real-Time Monitor (RTM), which can be programmed to monitor four selectable XRAM
locations at full sample rate. The data from the four monitored locations are serially output to the TMUXOUT
pin via the digital output multiplexer at the beginning of each CE code pass. The RTM can be enabled and
disabled with RTM_E (I/O RAM 0x2106[1]). The RTM output clock is available on the TMUX2OUT pin. Each
RTM word is clocked out in 35 cycles and contains a leading flag bit. See
format. RTM is low when not in use.
2.3.6 Pulse Generators
The 71M6543 provides four pulse generators, VPULSE, WPULSE, XPULSE and YPULSE. The XPULSE
and YPULSE generators are used by standard CE code to output CE status indicators, for example the
status of the sag detection, to DIO pins. All pulses can be configured to generate interrupts to the MPU.
The polarity of the pulses may be inverted with PLS_INV (I/O RAM 0x210C[0]). When this bit is set, the
pulses are active high, rather than the more usual active low. PLS_INV inverts all the pulse outputs.
The function of each pulse generator is determined by the CE code and the MPU code must configure the
corresponding pulse outputs in agreement with the CE code. For example, standard CE code produces a
mains zero-crossing pulse on XPULSE and a SAG pulse on YPULSE.
26
EQU[2:0]*
RTM DATA0 (32 bits)
RTM DATA1 (32 bits)
RTM DATA2 (32 bits)
RTM DATA3 (32 bits)
Note:
* Only EQU[2:0] = 5 is supported by the currently available CE code versions for the 71M6543. Contact
your local Teridian representative for CE codes that support equations 2, 3 and 4.
MUX_STATE
MUX_SYNC
2
3
4
5
CKTEST
CK32
RTM
2-element, 3-W, 3φ Delta
2-element, 4-W, 3φ Delta
2-element, 4-W, 3φ Wye
3-element, 4-W, 3φ Wye
FLAG
Description
0
1
30
© 2008–2011 Teridian Semiconductor Corporation
Table 7: Inputs Selected in Multiplexer Cycles
31
FLAG
Element 0
VA(IA-IB)/2
VA(IA-IB)/2 VB(IC-IB)/2
Figure 8: RTM Timing
VA ∙ IA
VA ∙ IA
0
1
Wh and VARh formula
30
31
Element 1
VB ∙ IB
VB ∙ IB
VC ∙IC
FLAG
S
0
Element 2
1
VC ∙ IC
N/A
N/A
N/A
30
Figure 8
31
FLAG
Multiplexer Sequence
IA VA IB VB IC VC (ID)
for the RTM output
IA VA IB VB IC VC
IA VA IB VB IC VC
Recommended
Table
IA VA IB VB
0
1
7. EQU[2:0]
30
31
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