ADE7518ASTZF16-RL Analog Devices Inc, ADE7518ASTZF16-RL Datasheet - Page 32

• Manufacturer Part Number: ADE7518ASTZF16-RL
• Description: 1-Phase Energy Meter IC
• Manufacturer: Analog Devices Inc

Specifications of ADE7518ASTZF16-RL

• Applications: Energy Measurement
• Core Processor: 8052
• Program Memory Type: FLASH (16 kB)
• Controller Series: ADE75xx
• Ram Size: 512 x 8
• Interface: I²C, SPI, UART
• Number Of I /o: 20
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADE7518
TRANSITIONING BETWEEN OPERATING MODES
The operating mode of the ADE7518 is determined by the power
supply connected to V
supply, such as when V
V
describes events that change the operating mode.
Automatic Battery Switchover (PSM0 to PSM1)
If any of the enabled battery switchover events occur (see the
Battery Switchover section), V
over results in a transition from the PSM0 to PSM1 operating
mode. When battery switchover occurs, the analog circuitry used
in the ADE energy measurement DSP is disabled. To reduce power
consumption, the user code can initiate a transition to PSM2.
Entering Sleep Mode (PSM1 to PSM2)
To reduce power consumption when V
V
in the Power Control SFR (POWCON, 0xC5) to shut down the
MCU core. Events capable of waking the MCU can be enabled
(see the 3.3 V Peripherals and Wake-Up Events section).
Servicing Wake-Up Events (PSM2 to PSM1)
The ADE7518 may need to wake up from PSM2 to service
wake-up events (see the 3.3 V Peripherals and Wake-Up Events
section). PSM1 code execution begins at the power-on reset
vector. After servicing the wake-up event, the ADE7518 can be
returned to PSM2 by setting Bit 4 in the Power Control SFR
(POWCON, 0xC5) to shut down the MCU core.
Automatic Switch to V
If the conditions to switch V
the Battery Switchover section), the operating mode switches to
PSM0. When this switch occurs, the MCU core and the analog
circuitry used in the ADE energy measurement DSP automatically
restart. PSM0 code execution begins at the power-on reset vector.
SWOUT
BAT
, user code can initiate sleep mode, PSM2, by setting Bit 4
switches to V
DD
SWOUT
, alter the operating mode. This section
SWOUT
DD
V
. Therefore, changes in the power
(PSM2 to PSM0)
SWOUT
SWOUT
switches from V
SWOUT
NORMAL MODE
CONNECTED TO V
switches to V
from V
PSM0
SWOUT
BAT
POWER SUPPLY
is connected to
to V
RESTORED
DD
BAT
DD
to V
Figure 33. Transitioning Between Operating Modes
V
DD
. This switch-
SWOUT
AUTOMATIC BATTERY
occur (see
BAT
SWITCHOVER
POWER SUPPLY
CONNECTED TO V
or when
SLEEP MODE
RESTORED
PSM2
Rev. 0 | Page 32 of 128
BAT
WAKE-UP
EVENT
V
SWOUT
Automatic Switch to V
If the conditions to switch V
the Battery Switchover section), the operating mode switches to
PSM0. When this switch occurs, the analog circuitry used in the
ADE energy measurement DSP automatically restarts. Note that
normal code execution continues. A software reset can be per-
formed to start PSM0 code execution at the power-on reset vector.
USING THE POWER MANAGEMENT FEATURES
Because program flow is different for each operating mode, the
status of V
bit in the Peripheral Configuration SFR (PERIPH, 0xF4) indicates
what V
to control program flow on wake-up. Because code execution
always starts at the power-on reset vector, Bit 6 of the PERIPH
SRF can be tested to determine which power supply is being
used and to branch to normal code execution or to wake up
event code execution. Power supply events can also occur when
the MCU core is active. To be aware of the events that change
what V
•
•
An early warning that battery switchover is about to occur is
provided by SAG detection and possibly low V
(see the Battery Switchover section).
For a user-controlled battery switchover, enable automatic
battery switchover on low V
event to generate the PSM interrupt. When a low V
occurs, start data backup. Upon completion of the data backup,
enable battery switchover on low V
occurs 30 ms later.
BATTERY MODE
Enable the battery switchover interrupt (EBSO)
if V
Enable the power supply restored interrupt (EPSR)
if V
CONNECTED TO V
SWOUT
SWOUT
PSM1
SWOUT
SWOUT
SWOUT
is connected to, use the following guidelines:
is connected to (see Table 18). This bit can be used
TO SHUT DOWN CORE AFTER
= V
= V
SERVICING WAKE-UP EVENT
USER CODE DIRECTS MCU
must be known at all times. The VSWSOURCE
DD
BAT
BAT
at power-up.
at power-up.
DD
(PSM1 to PSM0)
DD
SWOUT
only. Then, enable the low V
from V
DCIN
. Battery switchover
BAT
to V
DCIN
DD
detection
DCIN
occur (see
event
DCIN