ADE5166 datasheet(27/156 Pages) AD

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ADE5166/ADE5169/ADE5566/ADE5569

Rev. B | Page 27 of 156

POWER MANAGEMENT

The ADE5166/ADE5169/ADE5566/ADE5569 have elaborate

power management circuitry that manages the regular power

supply to battery switchover and power supply failures.

The power management functionalities can be accessed directly

through the 8052 power management SFRs (see Table 16).

Table 16. Power Management SFRs

SFR Address

R/W

Mnemonic

Description

0xEC

R/W

IPSME

Power management interrupt enable (see Table 21).

0xF5

R/W

BATPR

Battery switchover configuration (see Table 19).

0xF8

R/W

IPSMF

Power management interrupt flag (see Table 18).

0xFF

R/W

INTPR

Interrupt pins configuration (see Table 17).

0xF4

R/W

PERIPH

Peripheral configuration (see Table 20).

0xC5

R/W

POWCON

Power control (see Table 26).

0xFB

R/W

SCRATCH1

Scratch Pad 1 (see Table 22).

0xFC

R/W

SCRATCH2

Scratch Pad 2 (see Table 23).

0xFD

R/W

SCRATCH3

Scratch Pad 3 (see Table 24).

0xFE

R/W

SCRATCH4

Scratch Pad 4 (see Table 25).

POWER MANAGEMENT REGISTER DETAILS

Table 17. Interrupt Pins Configuration SFR (INTPR, Address 0xFF)

Bit

Mnemonic

Default

Description

Reserved

N/A

Reserved.

[6:5]

FSEL

Sets RTC calibration output frequency and calibration window.

FSEL

Result (Calibration Window, Frequency)

30.5 sec, 1 Hz

30.5 sec, 512 Hz

0.244 sec, 500 Hz

0.244 sec, 16 kHz

Reserved

N/A

Reserved.

[3:1]

INT1PRG

000

Controls the function of INT1.

INT1PRG

Result

X001

GPIO enabled

X011

BCTRL enabled

01X1

INT1 input disabled

11X1

INT1 input enabled

INT0PRG

Controls the function of INT0.

INT0PRG

Result

INT0 input disabled

INT0 input enabled

1 X = don’t care

Writing to the Interrupt Pins Configuration SFR (INTPR, Address 0xFF)

To protect the RTC from runaway code, a key must be written to the key SFR (KYREG, Address 0xC1) to obtain write access to the

INTPR SFR. The KYREG SFR (see Table 126) should be set to 0xEA to unlock the INTPR SFR and reset to 0 after a timekeeping register is

written to. The RTC registers can be written using the following 8052 assembly code:

MOV

KYREG, #0EAh

MOV

INTPR, #080h

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