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參數(shù)資料
| 型號： | 71M6521DE-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, QFP64 |
| 封裝： | LEAD FREE, LQFP-64 |
| 文件頁數(shù)： | 58/103頁 |
| 文件大?。?/td> | 1691K |
| 代理商： | 71M6521DE-IGTR/F |
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71M6521DE/71M6521FE
Energy Meter IC
DATA SHEET
OCTOBER 2010
Page: 58 of 103
2005-2010 Teridian Semiconductor Corporation
v1.1
A Maxim Integrated Products Brand
19-5370; 10/10
If there is no battery when system power returns, the part will switch to mission mode when PLL_OK rises. All configuration
bits will be in reset state, and RTC and MPU RAM data will be unknown and must be initialized by the MPU.
Wake Up Behavior
As described above, the part will always wake up in mission mode when system power is restored. Additionally, the part will
wake up in BROWNOUT mode when PB rises (push button pressed) or when a timeout of the wake-up timer occurs.
Wake on PB
If the part is in SLEEP or LCD mode, it can be awakened by a rising edge on the PB pin. This pin is normally pulled to GND
and can be pulled high by a push button depression. Before the PB signal rises, the MPU is in reset due to the internal signal
WAKE being low. When PB rises, WAKE rises and within three crystal cycles, the MPU begins to execute. The MPU can
determine whether the PB signal woke it up by checking the IE_PB flag.
For debouncing, the PB pin is monitored by a state machine operating from a 32Hz clock. This circuit will reject between 31ms
and 62ms of noise. Detection hardware will ignore all transitions after the initial rising edge. This will continue until the MPU
clears the IE_PB bit.
time
System
Power
(V3P3SYS)
MPU Mode
PLL_OK
15 CK32
cycles
WAKE
LCD
PB or wake-
up timer
BROWNOUT
Figure 25: Wake Up Timing
Wake on Timer
If the part is in SLEEP or LCD mode, it can be awakened by the wake-up timer. Until this timer times out, the MPU is in reset
due to WAKE being low. When the wake-up timer times out, the WAKE signal rises and within three crystal cycles, the MPU
begins to execute. The MPU can determine whether the timer woke it by checking the AUTOWAKE interrupt flag (IE_WAKE).
The wake-up timer begins timing when the part enters LCD or SLEEP mode. Its duration is controlled by WAKE_PRD[2:0] and
WAKE_RES. WAKE_RES selects a timer LSB of either 1 minute (WAKE_RES=1) or 2.5 seconds (WAKE_RES=0).
WAKE_PRD[2:0] selects a duration of from 1 to 7 LSBs.
The timer is armed by WAKE_ARM=1. It must be armed at least three RTC cycles before SLEEP or LCD_ONLY is initiated.
Setting WAKE_ARM presets the timer with the values in WAKE_RES and WAKE_PRD and readies the timer to start when the
MPU writes to SLEEP or LCD_ONLY. The timer is reset and disarmed whenever the MPU is awake. Thus, if it is desired to
wake the MPU periodically (every 5 seconds, for example) the timer must be rearmed every time the MPU is awakened.
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| 71M6521DE-IM/F | SPECIALTY ANALOG CIRCUIT, QCC68 |
| 71M6521FE-IMR/F | SPECIALTY ANALOG CIRCUIT, QCC68 |
| 71M6521DE-IGT/F | SPECIALTY ANALOG CIRCUIT, QFP64 |
| 71M6521FE-IGTR/F | SPECIALTY ANALOG CIRCUIT, QFP64 |
| 71M6521DE-IMR/F | SPECIALTY ANALOG CIRCUIT, QCC68 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 71M6521DE-IM/F | 功能描述:計量片上系統(tǒng) - SoC Residential Energy Meter IC 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(shù)據(jù) RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6521DEIM-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521DE Demo Brd |
| 71M6521DE-IMR/F | 功能描述:計量片上系統(tǒng) - SoC Residential Energy Meter IC 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(shù)據(jù) RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6521DH | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Energy Meter ICs |
| 71M6521DH-IGT/F | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Energy Meter ICs |
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