ADE7566 datasheet(33/144 Pages) AD

33 / 144 page

ADE7566/ADE7569/ADE7166/ADE7169

Rev. A | Page 33 of 144

OPERATING MODES

PSM0 (NORMAL MODE)

In PSM0, normal operating mode, VSWOUT is connected to VDD.

All of the analog circuitry and digital circuitry powered by

VINTD and VINTA are enabled by default. In normal mode, the

default clock frequency, fCORE, established during a power-on

reset or software reset, is 1.024 MHz.

PSM1 (BATTERY MODE)

In PSM1, battery mode, VSWOUT is connected to VBAT. In this

operating mode, the 8052 core and all of the digital circuitry are

enabled by default. The analog circuitry for the ADE energy

metering DSP powered by VINTA is disabled. This analog circuitry

automatically restarts, and the switch to the VDD power supply

occurs when the VDD supply is above 2.75 V and when the

PWRDN bit in the MODE1 register (0x0B) is cleared (see

Table 32). The default fCORE for PSM1, established during a

power-on reset or software reset, is 1.024 MHz.

PSM2 (SLEEP MODE)

PSM2 is a low power consumption sleep mode for use in battery

operation. In this mode, VSWOUT is connected to VBAT. All of the

2.5 V digital and analog circuitry powered through VINTA and VINTD

are disabled, including the MCU core, resulting in the following:

•

The RAM in the MCU is no longer valid.

•

The program counter for the 8052, also held in volatile

memory, becomes invalid when the 2.5 V supply is shut

down. Therefore, the program does not resume from

where it left off but always starts from the power-on reset

vector when the ADE7566/ADE7569/ADE7166/ADE7169

exit PSM2.

The 3.3 V peripherals (temperature ADC, VDCIN ADC, RTC,

and LCD) are active in PSM2. They can be enabled or disabled

to reduce power consumption and are configured for PSM2

operation when the MCU core is active (see Table 28 for more

information about the individual peripherals and their PSM2

configuration). The ADE7566/ADE7569/ADE7166/ADE7169

remain in PSM2 until an event occurs to wake them up.

In PSM2, the ADE7566/ADE7569/ADE7166/ADE7169 provide

four scratch pad RAM SFRs that are maintained during this

mode. These SFRs can be used to save data from PSM0 or

PSM1 when entering PSM2 (see Table 21 to Table 24).

In PSM2, the ADE7566/ADE7569/ADE7166/ADE7169

maintain some SFRs (see Table 27). The SFRs that are not listed

in this table should be restored when the part enters PSM0 or

PSM1 from PSM2.

Table 27. SFR Maintained in PSM2

I/O Configuration

Power Supply Monitoring

RTC Peripherals

LCD Peripherals

Interrupt Pins Configuration SFR

(INTPR, 0xFF), see Table 16

Battery Detection Threshold SFR

(BATVTH, 0xFA), see Table 51

RTC Nominal Compensation SFR

(RTCCOMP, 0xF6), see Table 126

LCD Segment Enable 2 SFR

(LCDSEGE2, 0xED), see Table 88

Peripheral Configuration SFR (PERIPH,

0xF4), see Table 19

Battery Switchover Configura-tion

SFR (BATPR, 0xF5), see Table 18

RTC Temperature Compensation

SFR (TEMPCAL, 0xF7), see Table 127

LCD Configuration Y SFR

(LCDCONY, 0xB1),see Table 81

Port 0 Weak Pull-Up Enable SFR

(PINMAP0, 0xB2), see Table 150

Battery ADC Value SFR

(BATADC, 0xDF), see Table 53

RTC Configuration SFR (TIMECON,

0xA1), see Table 120

LCD Configuration X SFR

(LCDCONX, 0x9C), see Table 79

Port 1 Weak Pull-Up Enable SFR

(PINMAP1, 0xB3), see Table 151

Peripheral ADC Strobe Period SFR

(STRBPER, 0xF9), see Table 48

Hundredths of a Second Counter

SFR (HTHSEC, 0xA2), see Table 121

LCD Configuration SFR

(LCDCON, 0x95), see Table 78

Port 2 Weak Pull-Up Enable SFR

(PINMAP2, 0xB4), see Table 152

Temperature and Supply Delta SFR

(DIFFPROG, 0xF3), see Table 49

Seconds Counter SFR (SEC, 0xA3),

see Table 122

LCD Clock SFR (LCDCLK, 0x96),

see Table 82

Scratch Pad 1 SFR (SCRATCH1, 0xFB),

see Table 21

VDCIN ADC Value SFR

(VDCINADC, 0xEF), see Table 52

Minutes Counter SFR (MIN, 0xA4),

see Table 123

LCD Segment Enable SFR

(LCDSEGE, 0x97) see Table 85

Scratch Pad 2 SFR (SCRATCH2, 0xFC),

see Table 22

Temperature ADC Value SFR

(TEMPADC, 0xD7), see Table 54

Hours Counter SFR (HOUR, 0xA5),

see Table 124

LCD Pointer SFR (LCDPTR, 0xAC),

see Table 86

Scratch Pad 3 SFR (SCRATCH3, 0xFD),

see Table 23

Alarm Interval SFR (INTVAL, 0xA6),

see Table 125

LCD Data SFR (LCDDAT, 0xAE),

see Table 87

Scratch Pad 4 SFR (SCRATCH4, 0xFE),

see Table 24

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