71m6534h-igt Maxim Integrated Products, Inc., 71m6534h-igt Datasheet - Page 71

• Manufacturer Part Number: 71m6534h-igt
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

FDS_6533_6534_004
3.12 Connecting the Reset Pin
Even though a functional meter will not necessarily need a reset switch, it is useful to have a reset push-
button for prototyping as shown in
V3P3SYS (functional in MISSION mode only), V3P3D (MISSION and BROWNOUT modes), or VBAT (all
modes, if a battery is present), or from a combination of these sources, depending on the application.
For a production meter, the RESET pin should be protected by the by the external components shown in
Figure
3.13 Connecting the Emulator Port Pins
Even when the emulator is not used, small shunt capacitors to ground (22 pF) should be used for protec-
tion from EMI as illustrated in
ground via a resistor of around 200 Ω.
The 71M6534 is capable of supporting a trace emulator. To connect this non-standard emulator, the pins
E_TBUS0 (SEG51) – E_TBUS3 (SEG54) and E_ISYNC (SEG55) have to be brought out to the emulator
interface.
v1.1
Figure 39: External Components for the RESET Pin: Push-Button (Left), Production Circuit (Right)
V3P3D
VBAT/
Since the 71M6533 and 71M6534 generates its own power-on reset, a reset button or circuitry, as
shown in
39, right side. R1 should be in the range of 100
1k ?
Figure
R
2
0.1µF
39, is only required for test units and prototypes.
Switch
Reset
GND
V3P3
© 2007-2009 TERIDIAN Semiconductor Corporation
Figure
Figure
Figure 38: Voltage Divider for V1
R
40. Production boards should have the ICE_E pin connected to
V3P3D
10k ?
16.9kΩ
1
39, left side. The RESET signal may be sourced from
R
1
R
RESET
DGND
2
71M6533/
71M6534
20kΩ
and mounted as closely as possible to the IC.
R
3
100pF
C
1
R
R
100Ω
100Ω
71M6533/71M6534 Data Sheet
1
1
V1
RESET
RESET
DGND
DGND
71M6533/
71M6534
71M6533
71M6533
71