71M6521DE-IM/F Maxim Integrated Products, 71M6521DE-IM/F Datasheet - Page 52
71M6521DE-IM/F
Manufacturer Part Number
71M6521DE-IM/F
Description
IC ENERGY METER 16K FLASH 68-QFN
Manufacturer
Maxim Integrated Products
Specifications of 71M6521DE-IM/F
Mounting Style
SMD/SMT
Package / Case
QFN-68
Program Memory Size
16 KB
Program Memory Type
Flash
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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71M6521DE/DH/FE Data Sheet
RESET
MISSION
V3P3SYS
falls
V1 > VBIAS
IE_PLLRISE
IE_PLLFALL
V1 <= VBIAS
-> 1
-> 1
V3P3SYS
V3P3SYS
rises
rises
LCD_ONLY
BROWNOUT
V3P3SYS
rises
RESET &
IE_PB -> 1
VBAT_OK
IE_WAKE ->
1
PB
SLEEP or
VBAT_OK
timer
LCD
timer
PB
VBAT_OK
VBAT_OK
RESET &
VBAT_OK
SLEEP
Figure 18: Operation Modes State Diagram
LCD Mode
In LCD mode, the data contained in the LCD_SEG registers is displayed, i.e. up to four LCD segments connected to
each of the pins SEG18 and SEG19 can be made to blink without the involvement of the MPU, which is disabled in
LCD mode.
This mode can be exited only by system power up, a timeout of the wake-up timer, or a push button. Figure 20 shows
the functional blocks active in LCD mode.
SLEEP Mode
In SLEEP mode, the battery current is minimized and only the Oscillator and RTC functions are active. This mode
can be exited only by system power-up, a timeout of the wake-up timer, or a push button event. Figure 21 shows the
functional blocks active in SLEEP mode.
Page: 52 of 107
Rev 2
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