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参数资料
| 型号： | 71M6511-IGT/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 封装： | LEAD FREE, LQFP-64 |
| 文件页数： | 35/98页 |
| 文件大小： | 1278K |
| 代理商： | 71M6511-IGT/F |
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71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 40 of 98
2005–2010 Teridian Semiconductor Corporation
V2.7
A Maxim Integrated Products Brand
crystal
XOUT
XIN
71M651X
Figure 9: Oscillator Circuit
The oscillator should be placed as close as possible to the IC, and vias should be avoided. An external resistor
across the crystal must not be added.
Real-Time Clock (RTC)
The RTC is driven directly by the crystal oscillator. In the absence of the 3.3V supply, the RTC is powered by the external
battery (VBAT pin). The RTC consists of a counter chain and output registers. The counter chain consists of seconds, minutes,
hours, day of week, day of month, month, and year. The RTC is capable of processing leap years. Each counter has its own
output register. Whenever the MPU reads the seconds register, all other output registers are automatically updated. Since the
RTC clock is not coherent to the MPU clock, the MPU must read the seconds register until two consecutive reads are the
same (requires either 2 or 3 reads). At this point, all RTC output registers will have the correct time. Regardless of the MPU
clock speed, RTC reads require one wait state.
The RTC interrupt must be enabled using the I/O RAM register EX_RTC (address 0x2002[1]). RTC time is set by writing to the
I/O RAM registers RTC_SEC, RTC_MIN, through RTC_YR. Each byte written to RTC must be delayed at least 3 CK32 cycles
from any previous byte written to RTC.
Two time correction bits, the I/O RAM registers RTC_DEC_SEC (0x201C[1]) and RTC_INC_SEC (0x201C[0]) are provided to
adjust the RTC time. A pulse on one of these bits causes the time to be decremented or incremented by an additional second
at the next update of the RTC_SEC register. Thus, if the crystal temperature coefficient is known, the MPU firmware can
integrate temperature and correct the RTC time as necessary as discussed in temperature compensation.
LCD Drivers
The 71M6511 contains 15 dedicated LCD segment pins, 5 LCD segment pins that rare shared with the SSI port and/or other
functions, and an additional 12 multi-purpose pins (LCD/DIO) that may be configured as LCD segment drivers (see I/O RAM
register LCD_NUM). Thus, the 71M6511/6511H is capable of driving between 80 to 128 pixels of LCD display with 25% duty
cycle. At seven segments per digit, the LCD can be designed for 11 to 18 digits for display. Since each pixel is addressed
individually, the LCD display can be a combination of alphanumeric digits and enunciator symbols. The information to be
displayed is written into the lower four bits of I/O RAM registers LCD_SEG0 through LCD_SEG37. Bit 0 corresponds to the
segment selected when COM0 pin is active while bit 1 is allocated to COM1.
The LCD driver circuitry is grouped into four common outputs (COM0 to COM3) and up to 32 segment outputs (see Table 56).
相关PDF资料 |
PDF描述 |
|---|---|
| 71M6511-IGT | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 71M6511-IGTR | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 71M6511H-IGTR/F | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 71M6511H-IGT/F | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 71M6511H-IGT | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6511-IGTR | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Single-Phase Energy Meter IC |
| 71M6511-IGTR/F | 功能描述:计量片上系统 - SoC Highly Integrated SoC w/MCU Core 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 |
| 71M6511-IGTR/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 |
| 71M6512-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6512 Demo Brd |
| 71M6512-IM/F | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Meter Extended Io |
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