71m6545h-igtr/f Maxim Integrated Products, Inc., 71m6545h-igtr/f Datasheet - Page 80

• Manufacturer Part Number: 71m6545h-igtr/f
• Description: Metrology Processors
• Manufacturer: Maxim Integrated Products, Inc.

2.5.12
Data Sheet 71M6545/H
31, is only required for test units and prototypes.
4.10 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
4.11 Flash Programming
4.11.1 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.
4.11.2 Flash Programming via the SPI Port
It is possible to erase, read and program the flash memory of the 71M6545/H via the SPI port. See
80
Figure 31: External Components for the RESET Pin: Push-Button (Left), Production Circuit (Right)
V3P3D
For a production meter, the RESET pin should be protected by the external components shown in
Figure
Since the 71M6545/H generates its own power-on reset, a reset button or circuitry, as shown in
for a detailed description.
31, right side. R1 should be in the range of 100Ω and mounted as closely as possible to the IC.
1k Ω
R
2
0.1µF
Figure 32: External Components for the Emulator Interface
Switch
Reset
62 Ω
62 Ω
Figure
V3P3D
© 2008–2011 Teridian Semiconductor Corporation
62 Ω
32. Production boards should have the ICE_E pin connected to ground.
22 pF
R
V3P3D
10k Ω
1
22 pF
22 pF
RESET
GNDD
71M6545/H
71M6545/H
ICE_E
E_RST
E_RXT
E_TCLK
R
R
100Ω
100Ω
1
1
RESET
RESET
DGND
DGND
71M6545/H
71M6533
71M6533
PDS_6545_009
Figure
v1.0