CDB5464U Cirrus Logic Inc, CDB5464U Datasheet - Page 24

• Manufacturer Part Number: CDB5464U
• Description: BOARD EVAL FOR CS5464 ADC
• Manufacturer: Cirrus Logic Inc
• Type: A/Dr

Specifications of CDB5464U

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS5464
• Primary Attributes: Watt-Hour Meter
• Secondary Attributes: Graphical User Interface, SPI™ & USB Interfaces
• Product: Data Conversion Development Tools
• Maximum Clock Frequency: 4 MHz
• Interface Type: USB
• Supply Voltage (max): 5 V
• Supply Voltage (min): 3.3 V
• For Use With/related Products: CS5464
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1554; CDB-5464U

7.6 Commands
7.6.1 Conversion
7.6.2 Synchronization (SYNC0 and SYNC1)
7.6.3 Power Control (Stand-by, Sleep, Wake-up/Halt and Software Reset)
24
B7
B7
B7
1
1
1
CC
S[1:0]
All commands are 1 byte (8 bits) long. Many command values are unused and should NOT be written by the
application program. All commands except register reads, register writes, or synchronizing commands will
abort any conversion, calibration, or any initialization sequence currently executing. This includes reset. No
commands other than reads or synchronizing should be executed until the reset sequence completes.
Executes a conversion (measurement) program.
The serial interface is bidirectional. While reading data on the SDO output, the SDI input must be receiving
commands. If no command is needed during a read, SYNC0 or SYNC1 commands can be sent while read
data is received on SDO.
The serial port is normally initialized by de-asserting CS. An alternative method of initialization is to send 3 or
more SYNC1 commands followed by a SYNC0. This is useful in systems where CS is not used and tied low.
The CS5464 has two power-down states, stand-by and sleep. In stand-by, all circuitry except the voltage ref-
erence and clocks are turned off. In sleep, all circuitry except the command decoder is turned off. A
Wake-up/Halt command restores full-power operation after stand-by and issues a hardware reset after sleep.
The Software Reset command is a program that emulates a pin reset and is not a power control function.
B6
B6
B6
1
1
0
B5
B5
B5
S1
1
1
0 = Perform a Single Conversion (0xE0)
1 = Perform Continuous Conversion (0xE8)
01 = Sleep
10 = Wake-up/Halt
11 = Stand-by
Continuous/Single Conversion
00 = Software Reset
B4
B4
B4
S0
0
1
CC
B3
B3
B3
1
0
B2
B2
B2
0
1
0
B1
B1
B1
0
1
0
SYNC
B0
B0
B0
0
0
CS5464
DS682F1