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ADE5166/ADE5169/ADE5566/ADE5569

Rev. B | Page 36 of 156

3.3 V PERIPHERALS AND WAKE-UP EVENTS

Some of the 3.3 V peripherals are capable of waking the ADE5166/

ADE5169/ADE5566/ADE5569 from PSM2 mode. The events that

can cause the ADE5166/ADE5169/ADE5566/ADE5569 to wake

up from PSM2 mode are listed in the wake-up event column in

Table 29. The interrupt flag associated with these events must

be cleared prior to executing instructions that put the ADE5166/

ADE5169/ADE5566/ADE5569 in PSM2 mode after wake-up.

Table 29. 3.3 V Peripherals and Wake-Up Events

3.3 V

Peripheral

Wake-Up

Event

Wake-Up

Enable Bits

Flag

Interrupt

Vector

Comments

Temperature

ADC

∆T

Maskable

The temperature ADC can wake up the ADE5166/ADE5169/

ADE5566/ADE5569. 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.

VDCINADC

ΔV

Maskable

FVADC

(IPSMF[3])

IPSM

The VDCIN measurement can wake up the ADE5166/ADE5169/

ADE5566/ADE5569. The FVADC flag, Bit 3 of the power manage-

ment interrupt flag SFR (IPSMF, Address 0xF8), is set according to

the description in the External Voltage Measurement section.

This wake-up event can be disabled by clearing the EVADC bit,

Bit 3 in the power management interrupt enable SFR (IPSME,

Address 0xEC); see Table 21. The FVADC flag needs to be cleared

prior to entering PSM2 mode.

Power Supply

Management

PSR

Nonmaskable

FPSR

(IPSMF[7])

IPSM

The ADE5166/ADE5169/ADE5566/ADE5569 wake up if the power

supply is restored (if VSWOUT switches to be connected to VDD). The

VSWSOURCE flag, Bit 6 of the peripheral configuration SFR (PERIPH,

Address 0xF4), is set to indicate that VSWOUT is connected to VDD.

RTC

Interval

Maskable

ITFLAG

(TIMECON[2])

IRTC

The ADE5166/ADE5169/ADE5566/ADE5569 wake up after the

programmable time interval has elapsed. The RTC interrupt needs

to be serviced and acknowledged prior to entering PSM2 mode.

Alarm

Maskable

ALFLAG

(TIMECON[6])

IRTC

An alarm can be set to wake the ADE5166/ADE5169/ADE5566/

ADE5569 after the desired amount of time. The RTC alarm is

enabled by setting the ALxxx_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.

I/O Ports1

INT0

INT0PRG = 1

(INTPR[0])

N/A

IE0

The edge of the interrupt is selected by the IT0 bit, Bit 0 in the

TCON SFR (TCON, Address 0x88). The IE0 flag, Bit 1 in the TCON

SFR, is not affected. The Interrupt 0 interrupt needs to be serviced

and acknowledged prior to entering PSM2 mode.

INT1

INT1PRG = 11x

(INTPR[3:1])

N/A

IE1

The edge of the interrupt is selected by the IT1 bit, Bit 2 in the

TCON SFR (TCON, Address 0x88). The IE1 flag, Bit 3 in the TCON

SFR, is not affected. The Interrupt 1 interrupt needs to be

serviced and acknowledged prior to entering PSM2 mode.

Rx2 edge

RXPROG = 11

(PERIPH[1:0])

RX2FLAG

(PERIPH[7])

N/A

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.

External

Reset

Nonmaskable

N/A

If the RESET pin is brought low while the ADE5166/ADE5169/

ADE5566/ADE5569 are in PSM2 mode, they wake up to PSM1

mode.

LCD

N/A

The LCD can be enabled/disabled in PSM2 mode. The LCD data

memory remains intact.

Scratch Pad

N/A

The four SCRATCHx registers remain intact in PSM2 mode.

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.

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