ADE5166_08 AD [Analog Devices], ADE5166_08 Datasheet - Page 33

• Manufacturer Part Number: ADE5166_08
• Description: Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
• Manufacturer: AD [Analog Devices]

3.3 V PERIPHERALS AND WAKE-UP EVENTS
Some of the 3.3 V peripherals are capable of waking the ADE5166/
ADE5169 from PSM2 mode. The events that can cause the
ADE5166/ADE5169 to wake up from PSM2 mode are listed
in the Wake-Up Event column in Table 28. The interrupt flag
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
1
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, Address 0xB2), Port 1
weak pull-up enable SFR (PINMAP1, Address 0xB3), and Port 2 weak pull-up enable SFR (PINMAP2, Address 0xB4) to decrease current consumption. The interrupts can
be enabled or disabled.
DCIN
ADC
1
Wake-Up
Event
∆T
ΔV
PSR
Interval
Alarm
INT0
INT1
Rx2 Edge
RESET
Wake-Up
Enable Bits
Maskable
Maskable
Nonmaskable
Maskable
Maskable
INT0PRG = 1
INT1PRG = 11x
RXPROG[1:0] = 11
Nonmaskable
Flag
FVADC
PSR
ITFLAG
Alarm
PERIPH[7]
(RX2FG)
Rev. 0 | Page 33 of 148
Interrupt
Vector
IPSM
IPSM
IRTC
IRTC
IE0
IE1
associated with these events must be cleared prior to executing
instructions that put the ADE5166/ADE5169 in PSM2 mode
after wake-up.
Comments
The temperature ADC can wake up the ADE5166/ADE5169.
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, Address 0xF3)
in PSM2 mode. The temperature interrupt needs to be
serviced and acknowledged prior to entering PSM2 mode.
The V
FVADC is set according to the description in the External
Voltage Measurement section. This wake-up event can be
disabled by clearing EVADC in the power management
interrupt enable SFR (IPSME, Address 0xEC); see Table 20. The
FVADC flag needs to be cleared prior to entering PSM2 mode.
The ADE5166/ADE5169 wake up if the power supply is restored
(if V
flag, Bit 6 of the peripheral configuration SFR (PERIPH,
Address 0xF4), is set to indicate that V
The ADE5166/ADE5169 wake up after the programmable
time interval has elapsed. The RTC interrupt needs to be
serviced and acknowledged prior to entering PSM2 mode.
An alarm can be set to wake the ADE5166/ADE5169 after the
desired amount of time. The RTC alarm is enabled by setting
the ALxx_EN bits in the RTC Configuration 2 SFR (TIMECON2,
Address 0xA2). The RTC interrupt needs to be serviced and
acknowledged prior to entering PSM2 mode.
The edge of the interrupt is selected by the IT0 bit in the TCON
SFR (TCON, Address 0x88). The IE0 flag bit in the TCON SFR 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 the IT1 bit in the TCON
SFR (TCON, Address 0x88). The IE1 flag bit in the TCON SFR 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 RxD2 line. The UART2 RxD flag needs to be cleared
prior to entering PSM2 mode.
If the RESET pin is brought low while the ADE5166/ADE5169
are in PSM2 mode, they wake up to PSM1 mode.
The LCD can be enabled/disabled in PSM2 mode. The LCD
data memory remains intact.
The four SCRATCHx registers remain intact in PSM2 mode.
SWOUT
DCIN
switches to be connected to V
measurement can wake up the ADE5166/ADE5169.
ADE5166/ADE5169
SWOUT
DD
). The VSWSOURCE
is connected to V
DD
.