ADE5166 datasheet(24/148 Pages) AD

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ADE5166/ADE5169

Rev. 0 | Page 24 of 148

POWER MANAGEMENT

The ADE5166/ADE5169 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 SFRs (see Table 15).

Table 15. Power Management SFRs

SFR Address

R/W

Mnemonic

Description

0xEC

R/W

IPSME

Power management interrupt enable (see Table 20).

0xF5

R/W

BATPR

Battery switchover configuration (see Table 18).

0xF8

R/W

IPSMF

Power management interrupt flag (see Table 17).

0xFF

R/W

INTPR

Interrupt pins configuration (see Table 16).

0xF4

R/W

PERIPH

Peripheral configuration (see Table 19).

0xC5

R/W

POWCON

Power control (see Table 25).

0xFB

R/W

SCRATCH1

Scratch Pad 1 (see Table 21).

0xFC

R/W

SCRATCH2

Scratch Pad 2 (see Table 22).

0xFD

R/W

SCRATCH3

Scratch Pad 3 (see Table 23).

0xFE

R/W

SCRATCH4

Scratch Pad 4 (see Table 24).

POWER MANAGEMENT REGISTER DETAILS

Table 16. Interrupt Pins Configuration SFR (INTPR, Address 0xFF)

Bit

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.

[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

[3:1]

INT1PRG

000

Controls the function of INT1.

INT1PRG

Result

X00

GPIO enabled

X01

BCTRL enabled

01X

INT1 input disabled

11X

INT1 input enabled

INT0PRG

Controls the function of INT0.

INT0PRG

Result

INT0 input disabled

INT0 input enabled

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 INTPR.

KYREG (see Table 125) should be set to 0xEA to unlock this 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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