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参数资料
| 型号： | 71M6515H-IGTWR/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP64 |
| 封装： | LEAD FREE, LQFP-64 |
| 文件页数： | 51/60页 |
| 文件大小： | 826K |
| 代理商： | 71M6515H-IGTWR/F |
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71M6515H
Energy Meter IC
DATA SHEET
JULY 2011
Page: 55 of 60
2005
2011 Teridian Semiconductor Corporation
1.6
A Maxim Integrated Products Brand
flag in the STATUS register. This happens because the incomplete or garbled data could have included a write command to the
CONFIG register or other important registers.
Methods of Control
Two different methods of control can be used by the host processor:
1)
Synchronization using the IRQZ pin of the 71M6515H (interrupt or DIO pin polling method, see Figure 19):
a. Interrupt Method: The IRQZ pin of the 71M6515H is connected to a pin of the host processor that can generate an
interrupt for the host processor. This is the easiest method for synchronization between the 71M6515H and the host.
The CONFIG register of the 71M6515H is set up to generate an interrupt on the IRQZ pin whenever fresh data are
ready, and the interrupt service routine of the host processor reads the fresh data out of the 71M6515H.
b. DIO pin polling method: The IRQZ pin of the 71M6515H is connected to a DIO pin of the host processor. The host
processor polls the status of the DIO pin as frequently as possible or through a timer-based polling method. The
CONFIG register of the 71M6515H is set up to have the IRQZ pin to go low on every fresh data ready status, and the
timer-serviced polling of the host processor will monitor the status of the DIO pin and initiate the serial communication
when IRQZ is detected. For this method to be effective, the firmware of the host processor must maintain the timer
interrupt to be the highest priority, followed by the serial communications priority.
2)
Polling the READY bit in the STATUS word of the 71M6515H (status polling method, see Figure 20).
This method requires that the host processor utilizes a timer with 1ms to 5ms resolution tied into the highest-priority
interrupt. The interrupt service routine must initiate reading the STATUS register, preferably at least every 10ms, in
order to monitor the READY bit, but the host processor must wait for the response of each status request. Otherwise,
the STATUS register read operations will be stacked in the 71M6515H resulting in multiple responses.
If a delayed response is received upon a STATUS register read, the host processor will know that the 71M6515H is
within its post-processing period, which makes it necessary hat the host waits for the response. Every time the
READY bit in the STATUS register is not set, indicating that data is not available, the host should poll again
Figure 19: Timing Diagram (Using IRQZ, SUM_CYCLES = 12)
The communication between the 71M6515H and the host processor can always be reset without disturbing the metering
function by utilizing the UARTCSZ and BAUDRATE pins. Configuring the BAUDRATE pin without resetting the UART buffers
is not recommended. The UART of the 71M6515H can be “reset” by pulling the UARTCSZ pin low. This will force the UART
back into the default configuration while clearing all buffers (UART buffers, UART-related buffers in the firmware).
200ms
400ms
80ms
read
command
fromhost
read
command
fromhost
post-processor
active
post-processor
active
6515H data
time
80ms
IRQZ
300ms
500ms
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521BE | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Energy Meter IC |
| 71M6521BE-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521BE Demo Brd |
| 71M6521BE-IGT/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 |
| 71M6521BE-IGT/F1 | 功能描述:计量片上系统 - SoC 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 |
| 71M6521BE-IGTR/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 |
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