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ADE7169F16 Datasheet(PDF) 111 Page - Analog Devices

Part # ADE7169F16
Description  Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver
PDF  140 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADE7169F16 Datasheet(HTML) 111 Page - Analog Devices

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Preliminary Technical Data
ADE7169F16
Rev. PrD | Page 111 of 140
RTC - REAL TIME CLOCK
The ADE7169F16 has an embedded Real Time Clock (RTC) – see Figure 75. The external 32.768 kHz crystal is used as the clock source
for the RTC. Calibration is provided to compensate the nominal crystal frequency and for variations in the external crystal frequency over
temperature. By default, the RTC is maintained active in all the Power Saving Modes. The RTC counters retain their values through
watchdog resets and external resets and are only reset during a power on reset.
8-BIT
PRESCALER
HUNDREDTHS COUNTER
HTHSEC
SECOND COUNTER
SEC
MINUTE COUNTER
MIN
HOUR COUNTER
HOUR
ITEN
ALARM EVENT
8-BIT
INTERVAL COUNTER
INTVAL SFR
INTERVAL
TIMEBASE
SELECTION
MUX
RTCEN
32.768kHz
CRYSTAL
ITS1 ITS0
EQUAL?
CALIBRATION
RTCCOMP
TEMPCAL
MIDNIGHT EVENT
CALIBRATED
32.768kHz
Figure 75: RTC implementation
RTC SFR REGISTER LIST
SFR
Address
Bit Addressable
Description
TIMECON
0xA1
No
RTC configuration
HTHSEC
0xA2
No
Hundredth of a second counter
SEC
0xA3
No
Seconds counter
MIN
0xA4
No
Minutes counter
HOUR
0xA5
No
Hours counter
INTVAL
0xA6
No
Alarm interval
RTCCOMP
0xF6
No
RTC nominal compensation



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