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參數資料
型號: 71M6542F-IGTR/F
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號調理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP100
封裝: LEAD FREE, LQFP-100
文件頁數: 4/165頁
文件大小: 2208K
代理商: 71M6542F-IGTR/F
v1.1
2008–2011 Teridian Semiconductor Corporation
101
4.9
Connecting Three-Wire EEPROMs
Wire EEPROMs and other compatible devices should be connected to the DIO pins SEGDIO2/SDCK
and SEGDIO3/SDATA, as described in 2.5.9 EEPROM Interface.
4.10
UART0 (TX/RX)
The UART0 RX pin should be pulled down by a 10 k
resistor and additionally protected by a 100 pF
ceramic capacitor, as shown in Figure 40.
Figure 40: Connections for UART0
4.11
Optical Interface (UART1)
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). Figure 41 shows the basic connections for
UART1. The OPT_TX pin becomes active when the I/O RAM 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.
The OPT_TX output may be modulated at 38 kHz when system power is present. Modulation is not
available in BRN mode. The OPT_TXMOD bit (I/O RAM 0x2456[1]) enables modulation. The duty cycle is
controlled by OPT_FDC[1:0] (I/O RAM 0x2457[5:4]), which can select 50%, 25%, 12.5%, and 6.25% duty
cycle. A 6.25% duty cycle means OPT_TX is low for 6.25% of the period. The OPT_RX pin uses digital
signal thresholds. It may need an analog filter when receiving modulated optical signals.
With modulation, an optical emitter can be operated at higher current than nominal, enabling it to
increase the distance along the optical path.
If operation in BRN mode is desired, the external components should be connected to V3P3D. However,
it is recommended to limit the current to a few mA.
TX
RX
71M654x
10 k
Ω
100 pF
RX
TX
相關PDF資料
PDF描述
71M6541D-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP64
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71M6541G-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP64
71M6541F-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP64
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相關代理商/技術參數
參數描述
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71M6542G 制造商:未知廠家 制造商全稱:未知廠家 功能描述:71M6541D/71M6541F/71M6541G/71M6542F/71M6542G 是 TeridianTM 的第4 代高集成度單相電表SoC
71M6542G-IGT/F 功能描述:計量片上系統 - SoC 1-Phase Metering SOC with 128KB Flash RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時鐘頻率:70 Hz 程序存儲器大小:64 KB 數據 RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel
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