ade7566 Analog Devices, Inc., ade7566 Datasheet - Page 32

• Manufacturer Part Number: ade7566
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

ADE7566/ADE7569
3.3 V PERIPHERALS AND WAKE-UP EVENTS
Some of the 3.3 V peripherals are capable of waking the ADE7566/ADE7569 from PSM2. The events that can cause the ADE7566/ADE7569
to wake up from PSM2 are listed in the wake-up events column in Table 28. The interrupt flag associated with these events must be
cleared prior to executing instructions that put the ADE7566/ADE7569 in PSM2 mode after wake-up.
Table 28. 3.3 V Peripherals and Wake-Up Events
3.3 V
Peripheral
Temperature
ADC
V
Power Supply
Management
RTC
I/O Ports
External Reset
LCD
Scratch Pad
DCIN
ADC
Wake-Up
Event
∆T
ΔV
PSR
Midnight
Alarm
All I/O pins are treated as inputs. The weak pull-up on each I/O pin can be disabled individually in the Port 0 Weak Pull-Up
Enable SFR (PINMAP0, 0xB2), Port 1 Weak Pull-Up Enable SFR (PINMAP1, 0xB3), and Port 2 Weak Pull-Up Enable SFR
(PINMAP2, 0xB4) to decrease current consumption. The interrupts can be enabled/disabled.
INT0
INT1
Rx Edge
RESET
Wake-Up
Enable Bits
Maskable
Maskable
Nonmaskable
Nonmaskable
Maskable
INT0PRG = 1
INT1PRG[2:0]
= 11x
RXPROG[1:0] =
11
Nonmaskable
Flag
FVDCIN
PSR
Midnight
Alarm
PERIPH.7
(RXFG)
Rev. 0 | Page 32 of 136
Interrupt
Vector
ITADC
IPSM
IPSM
IRTC
IRTC
IE0
IE1
Comments
The temperature ADC can wake up the ADE7566/ADE7569 if the
ITADC flag is set. A pending interrupt is generated according to
the description in the Temperature Measurement section. This
wake-up event can be disabled by disabling temperature
measurements in the Temperature and Supply Delta SFR
(DIFFPROG, 0xF3) in PSM2. The temperature interrupt needs to
be serviced and acknowledged prior to entering PSM2 mode.
The V
|The FVDCIN is set according to the description in the External
Voltage Measurement section. This wake-up event can be
disabled by clearing the EVDCIN in the Power Management
Interrupt Enable SFR (IPSME, 0xEC); see Table 20. The FVDCIN
flag needs to be cleared prior to entering PSM2 mode.
The ADE7566/ADE7569 wake up if the power supply is restored
(if V
Bit 6 of the Peripheral Configuration SFR (PERIPH, 0xF4), is set to
indicate that V
The ADE7566/ADE7569 wake up at midnight every day to
update their calendars. The RTC interrupt needs to be serviced
and acknowledged prior to entering PSM2 mode.
Set an alarm to wake the ADE7566/ADE7569 after the desired
amount of time. The RTC alarm is enabled by setting the ALARM
bit in the RTC Configuration SFR (TIMECON, 0xA1). The RTC
interrupt needs to be serviced and acknowledged prior to
entering PSM2 mode.
The edge of the interrupt is selected by Bit IT0 in the TCON register.
The IE0 flag bit in the TCON register is not affected. The Interrupt 0
interrupt needs to be serviced and acknowledged prior to
entering PSM2 mode.
The edge of the interrupt is selected by Bit IT1 in the TCON register.
The IE1 flag bit in the TCON register is not affected. The Interrupt 1
interrupt needs to be serviced and acknowledged prior to
entering PSM2 mode.
An Rx edge event occurs if a rising or falling edge is detected on
the Rx line. The UART RxD flag needs to be cleared prior to
entering PSM2 mode.
If the RESET pin is brought low while the ADE7566/ADE7569 is in
PSM2, it wakes up to PSM1.
The LCD can be enabled/disabled in PSM2. The LCD data
memory remains intact.
The four SCRATCHx registers remain intact in PSM2.
SW
DCIN
switches to be connected to V
measurement can wake up the ADE7566/ADE7569.
SW
is connected to V
DD
.
DD
). The VSWSOURCE flag,