MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 25

• Manufacturer Part Number: MAXQ3180
• Description: The MAXQ3180 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load
• Manufacturer: Maxim

Data and device command and control information are
located in internal registers. Registers range from 8 to 64
bits in length and are divided into RAM-based registers
and virtual registers. The RAM-based registers contain
both operating parameters and measurement results.
Figure 7. Flowchart for Reading from MAXQ3180
SPI TIMEOUT (320ms)
Low-Power, Multifunction, Polyphase AFE
______________________________________________________________________________________
N
N
N
N
Y
SEND COMMAND BYTE 1
SEND COMMAND BYTE 2
DELAY > 400 SYSCLK
DELAY > 400 SYSCLK
DELAY > 400 SYSCLK
READ MAXQ3180
GET DATA BYTE
SEND 0x00
SEND 0x00
GET 0xC1?
GET 0xC2?
GET 0x4E?
GET 0x41?
DONE?
Register Set
EXIT
The virtual registers contain calculated values derived
from one or more real registers. They are calculated at
the time they are requested, and thus can involve addi-
tional time to return a value. Most virtual registers are 8
bytes in length and are delivered least significant byte
first.
Figure 8. Flowchart for Writing to MAXQ3180
SPI TIMEOUT (320ms)
N
N
N
N
N
Y
SEND COMMAND BYTE 1
SEND COMMAND BYTE 2
DELAY > 400 SYSCLK
DELAY > 400 SYSCLK
DELAY > 400 SYSCLK
WRITE MAXQ3180
SEND DATA BYTE
SEND 0x00
GET 0xC1?
GET 0xC2?
GET 0x41?
GET 0x4E?
GET 0x41?
DONE?
EXIT
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