參數(shù)資料
型號(hào)： ADE7169ASTZF16
廠商： ANALOG DEVICES INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver
中文描述： SPECIALTY ANALOG CIRCUIT, QCC64
封裝： 9 X 9 MM, ROHS COMPLIANT, MO-22-VMMD-4, LFCSP-64
文件頁(yè)數(shù)： 26/140頁(yè)
文件大?。?/td> 1359K
代理商： ADE7169ASTZF16
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ADE7169F16
Preliminary Technical Data
V
SWOUT
output pin reflects the voltage at V
SW
, and has a
maximum output current of TBD mA. This pin may also be
used to power a limited number of peripheral components. The
2.5V analog supply, V
INTA
and the 2.5V supply for the core logic,
V
INTD
, are derived by on-chip linear regulators from V
SW
. Figure
9 shows the power supply architecture of ADE7169F16.
Rev. PrD | Page 26 of 140
The ADE7169F16 provides automatic battery switchover
between V
DD
and V
BAT
based on the voltage level detected at V
DD
or V
DCIN
. Additionally, the BCTRL input can also be used to
trigger a battery switchover. The conditions for switching V
SW
from V
DD
to V
BAT
and back to V
DD
are described in the Battery
Switchover section.
V
DCIN
is an input pin that can be connected to a 0V to 3.3V DC
signal. This input is intended for power supply supervisory
purposes and does not provide power to the ADE7169F16
circuitry - see Battery Switchover section.
MCU
SCRATCHPAD
LCD
RTC
TEMPERATURE ADC
DCIN
V
DD
V
INTD
V
INTA
V
3.3V
2.5V
LDO
BAT
V
SWOUT
V
BCTRL
SW
V
ADE
SPI/I2C
UART
LDO
POWER SUPPLY
MANAGEMENT
ADC
ADC
Figure 9: Power Supply Architecture
BATTERY SWITCHOVER
ADE7169F16 monitors V
DD
, V
BAT
, and V
DCIN
. Automatic
battery switchover from V
DD
to V
BAT
can be configured based on
the status of V
DD
, V
DCIN
, or the BCTRL pin. Battery switchover is
enabled by default. Setting bit 1 in the Battery Switchover
Configuration SFR (BATPR, 0xF5), disables battery switchover
so that V
DD
is always connected to V
SW
. The source of V
SW
is
indicated by bit 6 in the Peripheral Configuration SFR
(PERIPH, 0xF4), which is set when V
SW
is connected to V
DD
and
cleared when V
SW
is connected to V
BAT
.
The battery switchover functionality provided by the
ADE7169F16 allows a seamless transition from V
DD
to V
BAT
. An
automatic battery switchover option ensures a stable power
supply to the ADE7169F16, as long as the external battery
voltage is above TBD V. It allows continuous code execution
even while the internal power supply is switching from V
DD
to
V
BAT
and back. Note that the energy metering ADCs are not
available when V
BAT
is being used for V
SW
.
Power supply monitor (PSM) interrupts can be enabled to
indicate when battery switchover occurs and when the V
DD
power supply is restored - see the Power Supply Monitor
Interrupt (PSM) section.
Switching from V
DD
to V
BAT
There are three events that can be enabled to switch the internal
power supply, V
SW
, from V
DD
to V
BAT
:
1.
(V
DCIN
< 1.2 V):
When V
DCIN
falls below 1.2V V
SW
switches from V
DD
to V
BAT
. This event is enabled
when the BATTPROG[1:0] bits in the Battery
Switchover Configuration SFR (BATPR, 0xF5) are
clear. Setting this bit will disable switchover based on
V
DCIN
. Battery switchover on low V
DCIN
is disabled by
default.
2.
(V
DD
< TBD V):
When V
DD
falls below TBD V V
SW
switches from V
DD
to V
BAT
. This event is enabled
when BATTPROG[1] in the Battery Switchover
Configuration SFR (BATPR, 0xF5) is cleared.
3.
Rising edge on BCTRL:
When the battery control
pin, BCTRL, goes high, V
SW
switches from V
DD
to
V
BAT
. This external switchover signal can trigger a
switchover to V
BAT
at any time. Setting bits
INT1PRG[4:2] to 0bx01 in the Interrupt pins
configuration SFR (INTPR, 0xFF) enables the battery
control pin.
Switching from V
BAT
to V
DD
To switch V
SW
back from V
BAT
to V
DD
all of the events that are
enabled to force battery switchover must be false:
1.
(V
DCIN
< 1.2 V) and (V
DD
< TBD V) Enabled:
If the
low V
DCIN
condition is enabled, V
SW
switches to V
DD
after V
DCIN
remains above TBD V for TBD seconds
and V
DD
remains above TBD V for TBD seconds.
2.
(V
DD
< TBD V) Enabled:
V
SW
switches back to V
DD
after V
DD
has been above TBD V for TBD seconds.
3.
BCTRL Enabled:
V
SW
switches back to V
DD
after
BCTRL is low and number 1 or number 2 are satisfied.
POWER SUPPLY MONITOR INTERRUPT (PSM)
The Power Supply Monitor Interrupt (PSM) alerts the 8052 core
of power supply events. The PSM interrupt is disabled by
default. Setting the EPSM bit in the Interrupt Enable and
Priority 2 SFR (IEIP2, 0xA9) enables the PSM interrupt. The
Power Management Interrupt Enable SFR (IPSME, 0xEC)
controls the events that result in a PSM interrupt. Figure 10 is a
diagram illustrating how the PSM interrupt vector is shared
among the PSM interrupt sources. The PSM interrupt flags are
latched and must be cleared by writing to the flag register.
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