参数资料
型号: 71M6521FE-IMR/F
厂商: Maxim Integrated
文件页数: 51/107页
文件大小: 0K
描述: IC ENERGY METER 32K FLASH 68-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: Single Converter Technology®
测量误差: 0.4%
电源电压: 3 V ~ 3.6 V
测量仪表类型: 单相,双相
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-QFN(7.5x7.5)
包装: 带卷 (TR)
71M6521DE/DH/FE Data Sheet
MISSION
Circuit Function
System Power
1B
Battery Power ( Non-volatile Supply)
BROWNOUT LCD SLEEP
CE
CE Data RAM
FIR
Analog circuits:
PLL, ADC, VREF, BME etc
MPU clock rate
MPU_DIV
ICE
DIO Pins
Watchdog Timer
LCD
EEPROM Interface (2-wire)
EEPROM Interface (3-wire)
UART
Optical TX modulation
Flash Read
Flash Page Erase
Flash Write
RAM Read and Write
Wakeup Timer
Oscillator and RTC
DRAM data preservation
V3P3D voltage output pin
Yes
Yes
Yes
Yes
4.92MHz
(from PLL)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
--
Yes
--
--
28.672kHz
(7/8 of 32768Hz)
--
Yes
Yes
Yes
Yes
Yes (8kb/s)
Yes (16kb/s)
Yes
--
Yes
Yes
--
Yes
Yes
Yes
Yes
Yes
--
--
--
--
--
--
--
--
--
Yes
--
--
--
--
--
--
--
--
Yes
Yes
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Yes
Yes
--
--
Table 60: Available Circuit Functions (“—” means “not active”)
BROWNOUT Mode
In BROWNOUT mode, most non-metering digital functions, as shown in Table 60, are active, including ICE, UART,
EEPROM, LCD, and RTC. In BROWNOUT mode, a low bias current regulator will provide 2.5 Volts to V2P5 and
V2P5NV. The regulator has an output called BAT_OK to indicate that it has sufficient overhead. When BAT_OK = 0,
the part will enter SLEEP mode. From BROWNOUT mode, the MPU can voluntarily enter LCD or SLEEP modes.
When system power is restored, the part will automatically transition from any of the battery modes to mission mode,
once the PLL has settled.
The MPU will run at crystal clock rate in BROWNOUT. The value of MPU_DIV will be remembered (not changed) as
the part enters and exits BROWNOUT. MPU_DIV will be ignored during BROWNOUT.
While PLL_OK = 0, the I/O RAM bits ADC_E and CE_E are held in zero state disabling both ADC and CE. When
PLL_OK falls, the CE program counter is cleared immediately and all FIR processing halts. Figure 19 shows the
functional blocks active in BROWNOUT mode.
Rev 3
Page: 51 of 107
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