ADE7569 datasheet(23/136 Pages) AD

23 / 136 page

Preliminary Technical Data

ADE7566/ADE7569

Rev. PrA | Page 23 of 136

POWER MANAGEMENT

The ADE7566/ADE7569 have an 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 SFRs (see Table 13).

Table 13. Power Management SFRs

SFR Address

R/W

Mnemonic

Description

0xEC

R/W

IPSME

Power Management Interrupt Enable. See Table 18.

0xF5

R/W

BATPR

Battery Switchover Configuration. See Table 16.

0xF8

R/W

IPSMF

Power Management Interrupt Flag. See Table 15.

0xFF

R/W

INTPR

Interrupt Wake-Up Configuration. See Table 14.

0xF4

R/W

PERIPH

Peripheral Configuration SFR. See Table 17.

0xC5

R/W

POWCON

Power Control. See Table 23.

0xFB

R/W

SCRATCH1

Scratch Pad 1. See Table 19.

0xFC

R/W

SCRATCH2

Scratch Pad 2. See Table 20.

0xFD

R/W

SCRATCH3

Scratch Pad 3. See Table 21.

0xFE

R/W

SCRATCH4

Scratch Pad 4. See Table 22.

POWER MANAGEMENT REGISTER DETAILS

Table 14. Interrupt Pins Configuration SFR (INTPR, 0xFF)

Bit No.

Mnemonic

Default

Description

RTCCAL

Controls RTC calibration output. When set, the RTC calibration frequency selected by FSEL[1:0] is

output on the P0.2/CF1/RTCCAL pin.

Sets RTC calibration output frequency and calibration window.

FSEL[1:0]

Result (Calibration window, frequency)

30.5 sec, 1 Hz

30.5 sec, 512 Hz

0.244 sec, 500 Hz

6 to 5

FSEL[1:0]

0.244 sec, 16.384 kHz

Reserved

Controls the function of INT1.

INT1PRG[2:0]

Result

X00

GPIO enabled

X01

BCTRL enabled

01X

INT1 input disabled

3 to 1

INT1PRG[2:0]

000

11X

INT1 input enabled

Controls the function of INT0.

INT0PRG

Result

INT0 input disabled

INT0PRG

INT0 input enabled

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

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

Configuration SFR (INTPR, 0xFF). KYREG should be set to 0xEA to unlock this SFR and reset to zero 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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