71m6543h-igtr/f Maxim Integrated Products, Inc., 71m6543h-igtr/f Datasheet - Page 93
71m6543h-igtr/f
Manufacturer Part Number
71m6543h-igtr/f
Description
Energy Meter Ic
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6543H-IGTRF.pdf
(157 pages)
- Current page: 93 of 157
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4.6
I
SEGDIO3, as shown in
Pullup resistors of roughly 10 kΩ to V3P3D (to ensure operation in BRN mode) should be used for both
SDCK and SDATA signals. The DIO_EEX (I/O RAM 0x2456[7:6]) field must be set to 01 in order to convert
the DIO pins SEGDIO2 and SEGDIO3 to I
4.7
µWire EEPROMs and other compatible devices should be connected to the DIO pins SEGDIO2 and
SEGDIO3, as described in
4.8
The UART0 RX pin should be pulled down by a 10 kΩ resistor and additionally protected by a 100 pF
ceramic capacitor, as shown in
4.9
The OPT_TX and OPT_RX pins can be used for a regular serial interface (by connecting a RS_232
transceiver for example), or they can be used to directly operate optical components (for example, an
infrared diode and phototransistor implementing a FLAG interface).
for UART1. The OPT_TX pin becomes active when the control field OPT_TXE (I/O RAM 0x2456[3:2]) is
set to 00.
The polarity of the OPT_TX and OPT_RX pins can be inverted with the configuration bits, OPT_TXINV
(I/O RAM 0x2456[0]) and OPT_RXINV (I/O RAM 0x2457[1]), respectively.
v1.0
2
C EEPROMs or other I
Connecting I
Connecting Three-Wire EEPROMs
UART0 (TX/RX)
Optical Interface (UART1)
Figure
2
2
C compatible devices should be connected to the DIO pins SEGDIO2 and
C EEPROMs
2.5.11 EEPROM Interface
© 2008–2011 Teridian Semiconductor Corporation
71M6543F/H
33.
Figure
Figure 33: I
Figure 34: Connections for UART0
71M6543F/H
34.
TX
2
DIO2
RX
DIO3
C pins SCL and SDATA.
2
10 k Ω
C EEPROM Connection
100 pF
on page 65.
10 k Ω
10 k Ω
EEPROM
SDCK
SDATA
V3P3D
Figure 35
TX
RX
shows the basic connections
71M6543F/H Data Sheet
93
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