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参数资料
| 型号： | 71M6521FE-IM/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC68 |
| 封装： | LEAD FREE, LQFN-68 |
| 文件页数： | 39/103页 |
| 文件大小： | 1691K |
| 代理商： | 71M6521FE-IM/F |
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71M6521DE/71M6521FE
Energy Meter IC
DATA SHEET
OCTOBER 2010
Page: 40 of 103
2005-2010 Teridian Semiconductor Corporation
v1.1
A Maxim Integrated Products Brand
19-5370; 10/10
Optical Interface
The device includes an interface to implement an IR/optical port. The pin OPT_Tx is designed to directly drive an external LED
for transmitting data on an optical link. The pin OPT_RX is designed to sense the input from an external photo detector used
as the receiver for the optical link. These two pins are connected to a dedicated UART port (UART1).
The OPT_TX and OPT_RX pins can be inverted with configuration bits OPT_TXINV and OPT_RXINV, respectively.
Additionally, the OPT_TX output may be modulated at 38kHz. Modulation is available when system power is present (i.e. not
in BROWNOUT mode). The OPT_TXMOD bit enables modulation. Duty cycle is controlled by OPT_FDC[1:0], which can select
50%, 25%, 12.5%, and 6.25% duty cycle. 6.25% duty cycle means OPT_TX is low for 6.25% of the period. Figure 7 illustrates
the OPT_TX generator.
B
A
OPT_TXINV
from OPT_TX UART
MOD
EN
DUTY
OPT_TX
OPT_TXMOD
OPT_FDC
OPT_TXE[1:0]
1
2
V3P3
Internal
A
B
OPT_TXMOD=0
OPT_TXMOD=1,
OPT_FDC=2 (25%)
B
A
1/38kHz
0
2
3
DIO2
WPULSE
VARPULSE
Figure 7: Optical Interface
When not needed for the optical UART, the OPT_TX pin can alternatively be configured as DIO2, WPULSE, or VARPULSE.
The configuration bits are OPT_TXE[1:0]. Likewise, OPT_RX can alternately be configured as DIO_1. Its control is OPT_RXDIS.
Digital I/O
The device includes up to 18 pins (QFN 68 package) or 14 pins (LQFP 64 package) of general purpose digital I/O. These pins
are compatible with 5V inputs (no current-limiting resistors are needed). Some of them are dedicated DIO (DIO3), some are
dual-function that can alternatively be used as LCD drivers (DIO4-11, 14-17, 19-21) and some share functions with the optical
port (DIO1, DIO2). On reset or power-up, all DIO pins are inputs until they are configured for the desired direction under MPU
control. The pins are configured by the DIO registers and by the five bits of the LCD_NUM register (located in I/O RAM). Once
declared as DIO, each pin can be configured independently as an input or output with the DIO_DIRn bits. A 3-bit configuration
word, DIO_Rx, can be used for certain pins, when configured as DIO, to individually assign an internal resource such as an
interrupt or a timer control. Table 54 lists the direction registers and configurability associated with each group of DIO pins.
Table 55 shows the configuration for a DIO pin through its associated bit in its DIO_DIR register.
Tables showing the relationship between LCD_NUM and the available segment/DIO pins can be found in the Applications
section and in the I/O RAM Description under LCD_NUM[4:0].
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521FE-IMR | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Energy Meter IC |
| 71M6521FE-IMR/F | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6521-TGP1-68M | 制造商:Maxim Integrated Products 功能描述:Programmer Accessories Gang Programmer Base w/6521 Socket Brd |
| 71M6523-DB | 功能描述:开发板和工具包 - 8051 71M6521D Demo Brd RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
| 71M6523-IM | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
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