71M6543F Datasheet, PDF (96/157 Pages) Maxim Integrated Products – Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation

71M6543F/H and 71M6543G/GH Data Sheet
VBAT/
V3P3D
R₂
1k Ω
Reset
Switch
0.1µF
V3P3D
71M6543
10k Ω
R₁
RESET
GNDD
7711MM6655433 3
100Ω
R₁
RESET
DGND
Figure 36: External Components for the RESET Pin: Push-Button (Left), Production Circuit (Right)
4.11 Connecting the Emulator Port Pins
Even when the emulator is not used, small shunt capacitors to ground (22 pF) should be used for protection
from EMI as illustrated in Figure 37. Production boards should have the ICE_E pin connected to ground.
V3P3D
LCD Segments
(optional)
62 Ω
62 Ω
62 Ω
22 pF 22 pF 22 pF
71M6543
ICE_E
E_RST
E_RXT
E_TCLK
Figure 37: External Components for the Emulator Interface
4.12 Flash Programming
4.12.1 Flash Programming via the ICE Port
Operational or test code can be programmed into the flash memory using either an in-circuit emulator or
the Flash Programmer Module (TFP-2) available from Teridian. The flash programming procedure uses
the E_RST, E_RXTX, and E_TCLK pins.
4.12.2 Flash Programming via the SPI Port
It is possible to erase, read and program the flash memory of the 71M6543 via the SPI port. See
2.5.12 for a detailed description.
4.13 MPU Demonstration Code
All application-specific MPU functions mentioned in 4 Application Information are featured in the
demonstration C source code supplied by Teridian. The code is available as part of the Demonstration Kit
for the 71M6543. The Demonstration Kits come with the 71M6543 preprogrammed with demonstration
firmware and mounted on a functional sample meter Demo Board. The Demo Boards allow for quick and
efficient evaluation of the IC without having to write firmware or having to supply an in-circuit emulator
(ICE).
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