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ADE7569 数据表(PDF) 107 Page - Analog Devices

部件名 ADE7569
功能描述  Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
PDF  136 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADE7569 数据表(HTML) 107 Page - Analog Devices

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Preliminary Technical Data
ADE7566/ADE7569
Rev. PrA | Page 107 of 136
REAL TIME CLOCK
The ADE7566/ADE7569 have an embedded real time clock
(RTC) as shown in Figure 88. 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 power-saving modes. The RTC
counters retain their values through watchdog resets and
external resets. They are only reset during a power-on reset.
8-BIT
PRESCALER
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
HUNDREDTHS COUNTER
HTHSEC
Figure 88. RTC Implementation
RTC SFR REGISTER LIST
Table 115. Real Time Clock SFR
SFR
Address
Bit Addressable
Description
TIMECON
0xA1
No
RTC Configuration (see Table 116).
HTHSEC
0xA2
No
Hundredths of a Second Counter (see Table 117).
SEC
0xA3
No
Seconds Counter (see Table 118).
MIN
0xA4
No
Minutes Counter (see Table 119).
HOUR
0xA5
No
Hours Counter (see Table 120).
INTVAL
0xA6
No
Alarm Interval (see Table 121).
RTCCOMP
0xF6
No
RTC Nominal Compensation (see Table 122).
TEMPCAL
0xF7
No
RTC Temperature Compensation (see Table 123).



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