EVAL-ADE7878EBZ Analog Devices Inc, EVAL-ADE7878EBZ Datasheet - Page 16

• 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
Phase Current Monitoring
This panel allows the user to visualize the state of
compares the phase currents against a threshold determined by
LPOILVL[7:0] register (see Figure 33). The button “READ
STATUS OF
pins, visualizes and interprets it. This operation is managed by
LPOILVL[7:0] register and it can only be modified in PSM0
mode. The panel offers this option by switching ADE7878 in
PSM0 and then back in PSM2 when one of “READ/WRITE
LPOILVL” buttons is pressed. To avoid toggling both PM0 and
PM1 pins in the same time during this switch, ADE7878 is
ordered first in PSM3 when changing modes.
Enter PSM3 Mode
In PSM3 sleep mode, the ADE7878 has most of its internal
circuits turned off. Therefore, no submenu is activated while in
IRQ pins because in PSM2 low power mode, ADE7878
1
Figure 33. Panel managing Current Monitoring in PSM2 mode
Figure 32. Front Panel after ADE7878 enters PSM2 mode
IRQ AND
0
IRQ PINS” reads the status of these
1
IRQ and
0
Rev. PrB | Page 16 of 30
this mode. User can press one of “Enter PSM0, PSM1 or PSM2”
buttons to order ADE7878 in one of these power modes.
COMMUNICATION PROTOCOL BETWEEN
MICROCONTROLLER AND ADE7878
This chapter lists the protocol commands that have been
implemented to manage ADE7878 from the PC using the
microcontroller.
The microcontroller is a pure slave during the communication.
It receives a command from PC, it excutes it and then sends an
answer to the PC. The PC should wait the answer before
sending a new command to the microcontroller.
Table 3. Echo Command—Message from PC to Microcontroller
Byte
0
1
2
3
4
…
N
N+1
Table 4. Echo Command—Answer from Microcontroller to PC
Byte
0
1
2
3
4
…
N+1
N+2
Table 5. Power Mode Select—Message from PC to
Microcontroller
Byte
0
1
2
Table 6. Power Mode Select—Answer from Microcontroller
to PC
Byte
0
1
Table 7. Reset—Message from PC to Microcontroller
Byte
Description
Description
‘R’=0x52
‘~’=0x7E to acknowledge the operation was successful
Description
‘A’=0x41
N=Number of bytes transmitted after this byte
Data byte N-1 (MS)
Data byte N-2
Data byte N-3
…
Data byte 1
Data byte 0 (LS)
Description
‘R’=0x52
‘A’=0x41
N=Number of bytes transmitted after this byte
Data byte N-1 (MS)
Data byte N-2
…
Data byte 1
Data byte 0 (LS)
Description
‘B’=0x42 - change PSM mode
N=1
Data Byte 0:
0x00=PSM0
0x01=PSM1
0x02=PSM2
0x03=PSM3
Preliminary Technical Data