cs5460 Cirrus Logic, Inc., cs5460 Datasheet - Page 15

• Manufacturer Part Number: cs5460
• Description: Single Phase Bi-directional Power/energy Ic
• Manufacturer: Cirrus Logic, Inc.

3.1 Command Word (Write Only)
All command words are always 1 byte in length. Commands that write to a register initiate 3 bytes of register data.
Commands that read from registers must be followed by 1, 2, or 3 bytes of register read data. Commands that read
data can be chained with other commands (e.g., while reading data, a new command can be sent to SDI which can
execute before the original read is completed). This allows for “chaining” commands.
3.1.1 Start Conversions
3.1.2 SYNC0 Command
3.1.3 SYNC1 Command
3.1.4 Power-up/Halt Control
DS279PP5
B7
B7
B7
B7
1
1
1
1
This command indicates to the state machine to begin acquiring measurements and calculating results. The de-
vice has two modes of acquisition.
C
This command is the end of the serial port re-initialization sequence. The command can also be used as a NOP
command. The serial port is resynchronized to byte boundaries by sending three or more consecutive SYNC1
commands followed by a SYNC0 command.
This command is part of the serial port re-initialization sequence. The command can also serve as a NOP com-
mand, but no more than three consecutive bytes should be transmitted.
If the device is powered-down, this command will power-up the device. When powered-on, no computations will
be running. If the part is already powered-on, all computations will be halted.
B6
B6
B6
B6
1
1
1
0
B5
B5
B5
B5
1
1
1
1
0 = Perform a single computation cycle
1 = Perform continuous computation cycles
Modes of measurement
B4
B4
B4
B4
0
1
1
0
B3
B3
B3
B3
C
1
1
0
B2
B2
B2
B2
0
1
1
0
B1
B1
B1
B1
0
1
1
0
B0
B0
B0
B0
0
0
1
0
CS5460
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