参数资料
| 型号： | EM773FHN33,551 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 4/51页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER ARM 32VQFN |
| 其它有关文件： | EM773 Energy Metering IC Training |
| 特色产品： | EM773 Energy Metering IC |
| 标准包装： | 260 |
| 核心处理器： | ARM? Cortex?-M0 |
| 芯体尺寸： | 32-位 |
| 速度： | 48MHz |
| 连通性： | I²C，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，WDT |
| 输入/输出数： | 25 |
| 程序存储器容量： | 32KB（32K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 8K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.8 V ~ 3.6 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-VQFN 裸露焊盘 |
| 包装： | 托盘 |
| 配用： | 568-6681-ND - BOARD EVAL EM773 METER EU PLUG 568-6680-ND - BOARD EVAL EM773 METER US PLUG |
| 其它名称： | 568-5213 |
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EM773
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 3 January 2012
12 of 51
NXP Semiconductors
EM773
Energy metering IC
7.8 UART
The EM773 contains one UART.
Support for RS-485/9-bit mode allows both software address detection and automatic
address detection using 9-bit mode.
The UART includes a fractional baud rate generator. Standard baud rates such as
115200 Bd can be achieved with any crystal frequency above 2 MHz.
7.8.1 Features
Maximum UART data bit rate of 3.125 MBit/s.
16 Byte Receive and Transmit FIFOs.
Register locations conform to 16C550 industry standard.
Receiver FIFO trigger points at 1 B, 4 B, 8 B, and 14 B.
Built-in fractional baud rate generator covering wide range of baud rates without a
need for external crystals of particular values.
FIFO control mechanism that enables software flow control implementation.
Support for RS-485/9-bit mode.
Support for modem control.
7.9 SPI serial I/O controller
The SPI controller is capable of operation on a SSP, 4-wire SSI, or Microwire bus. It can
interact with multiple masters and slaves on the bus. Only a single master and a single
slave can communicate on the bus during a given data transfer. The SPI supports full
duplex transfers, with frames of 4 bits to 16 bits of data flowing from the master to the
slave and from the slave to the master. In practice, often only one of these data flows
carries meaningful data.
7.9.1 Features
Maximum SPI speed of 25 Mbit/s (master) or 4.17 Mbit/s (slave) (in SSP mode)
Compatible with Motorola SPI, 4-wire Texas Instruments SSI, and National
Semiconductor Microwire buses
Synchronous serial communication
Master or slave operation
8-frame FIFOs for both transmit and receive
4-bit to 16-bit frame
7.10 I2C-bus serial I/O controller
The EM773 contains one I2C-bus controller.
The I2C-bus is bidirectional for inter-IC control using only two wires: a Serial Clock Line
(SCL) and a Serial DAta line (SDA). Each device is recognized by a unique address and
can operate as either a receiver-only device (e.g., an LCD driver) or a transmitter with the
capability to both receive and send information (such as memory). Transmitters and/or
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