EVAL-ADE7878EBZ Analog Devices Inc, EVAL-ADE7878EBZ Datasheet - Page 8

• Manufacturer Part Number: EVAL-ADE7878EBZ
• Description: Energy Meter Eval. Board
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADE7878EBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Energy Meter
• Kit Application Type: Data Converter
• Silicon Core Number: ADE7878
• Features: External Transducers, LED Indicators, Logic Outputs
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4472972; Q4684026; Q5015773

EVAL-ADE7878EB
visualized as “XXXXX”. In this case, all the windows of the
evaluation software are still accessible, but no communication
can be executed. In both cases, whether the search for COM
port is successful or not, the cursor is put back at “Please select
from the following options” in the main menu, “Find COM
Port” is greyed out and the next main menu options are enabled
(see Figure 7). These options allow the user to command
ADE7878 in any of PSM0 or PSM3 power modes. The other
power modes PSM1 and PSM2 are not available for now
because initializations have to be made in PSM0 before using
ADE7878 in one of these modes.
PSM0 – Normal Power Mode
Right after the evaluation board has been powered up,
ADE7878 is in PSM3 sleep mode. When “Enter PSM0 mode”
choice is selected, the microcontroller manipulates PM0 and
PM1 pins of ADE7878 to switch it into PSM0 mode. It waits
50msec for the circuit to power up and if the SPI is the
communication activated on the board, it executes 3 SPI write
operations to address 0xEBFF of ADE7878 to activate the SPI
port. If the operation has been correctly executed or the I2C
communication is used, the message “Configuring LPC2369 –
ADE7878 communication was successful” is displayed and the
user has to click “OK” to continue. The only error that may
occur during this operation is communication related, so if this
happens, the following message is visualized: “Configuring
LPC2368 – ADE7878 communication was not successful. Please
check the communication between the PC and ADE7878
evaluation board and between LPC2368 and ADE78xx”.
Bit 1 (PORT_LOCK) of CONFIG2[7:0] register is now set to 1
to lock in the serial port choice. Then DICOEFF register is
initialized with 0xFF8000 and the DSP of ADE7878 is started by
writing RUN=0x1. At the end of this process, the entire main
menu is greyed out and the submenu is enabled. In this way, the
user can now manage all the functionalities of ADE7878 in
PSM0 mode. To switch ADE7878 in another power mode, Exit
Figure 7. Front panel after the COM port has been identified
Rev. PrB | Page 8 of 30
button of submenu has to be clicked. The state of the front
panel is presented in Figure 8.
Reset ADE7878
When “Reset ADE7878” is selected, the RESET pin of
ADE7878 is kept low for 20msec and then is set high. If the
operation was correctly executed, the message “ADE7878 was
reset successfully” is displayed and the users have to click “OK”
to move forward. The only error that may occur during this
operation is communication related, so if this happens, the
following message is visualized: “The communication between
PC and ADE7878 evaluation board or between LPC2368 and
ADE78xx did not function correctly. There is no guarantee the
reset of ADE7878 has been performed. ”
Configure Communication
When “Configure Communication” is selected, the screen
presented in Figure 9 is opened. This menu is useful if an
ADE7878 reset has been performed and the SPI is not anymore
the active serial port. User selects SPI port and then clicks OK
button to update selection and lock the port. If the port
selection is successful, the message “Configuring LPC2368 –
ADE7878 communication was successful” is displayed and the
users have to click “OK” to move forward. If a communication
error happens, then the message “Configuring LPC2368 –
ADE7878 communication was not successful. Please check the
communication between the PC and ADE7878 evaluation
board” is displayed. Then CONFIG2[7:0] register is written
with bit 1 (PORT_LOCK) set to 1, so the user does not need to
remember to set it once the communication is set.
CONFIG2[7:0] is then read back and visualized together with
bit 1 (PORT_LOCK).
If EXIT button is pressed, the window is closed and the cursor
is put at “Please select from the following options” in the
submenu of the Front Panel screen.
Figure 8. Front panel after ADE7878 enters PSM0 mode
Preliminary Technical Data