Datasheet

71M6543F/71M6543G Data Sheet
94 v2
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.
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 Maxim. 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 Maxim. 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).
E_RST
71M6543
E_TCLK
62
Ω
62 Ω
62 Ω
22 pF
22 pF
22 pF
LCD Segments
ICE_E
V3P3D
E_RXT
(optional)
R
1
RESET
71M6543
GNDD
V3P3D
R
2
VBAT/
V3P3D
Reset
Switch
1k
Ω
0.1µF
10k
Ω
71M6543