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CS5463-ISZ Datasheet(PDF) 6 Page - Cirrus Logic |
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CS5463-ISZ Datasheet(HTML) 6 Page - Cirrus Logic |
6 / 46 page CS5463 6 DS678F2 2. PIN DESCRIPTION Clock Generator Crystal Out Crystal In 1,24 XOUT, XIN – The output and input of an inverting amplifier. Oscillation occurs when connected to a crystal, providing an on-chip system clock. Alternatively, an external clock can be supplied to the XIN pin to provide the system clock for the device. CPU Clock Output 2 CPUCLK – Output of on-chip oscillator which can drive one standard CMOS load. Control Pins and Serial Data I/O Serial Clock Input 5 SCLK – A Schmitt-trigger input pin. Clocks data from the SDI pin into the receive buffer and out of the transmit buffer onto the SDO pin when CS is low. Serial Data Output 6 SDO – Serial port data output pin.SDO is forced into a high-impedance state when CS is high. Chip Select 7 CS – Low, activates the serial port interface. Mode Select 8 MODE - High, enables the “auto-boot” mode. The mode pin has an internal pull-down resistor. Energy Output 18,21,22 E3, E1, E2 – Active-low pulses with an output frequency proportional to the selected power. Con- figurable outputs for active, apparent, and reactive power, negative energy indication, zero cross detection, and power failure monitoring. E1, E2, E3 outputs are configured in the Operational Modes Register. Reset 19 RESET – A Schmitt-trigger input pin. Low activates Reset, all internal registers (some of which drive output pins) are set to their default states. Interrupt 20 INT - Low, indicates that an enabled event has occurred. Serial Data Input 23 SDI - Serial port data input pin. Data will be input at a rate determined by SCLK. Analog Inputs/Outputs Differential Voltage Inputs 9,10 VIN+, VIN- – Differential analog input pins for the voltage channel. Differential Current Inputs 15,16 IIN+, IIN- – Differential analog input pins for the current channel. Voltage Reference Output 11 VREFOUT – The on-chip voltage reference output. The voltage reference has a nominal magni- tude of 2.5 V and is referenced to the AGND pin on the converter. Voltage Reference Input 12 VREFIN – The input to this pin establishes the voltage reference for the on-chip modulator. Power Supply Connections Positive Digital Supply 3 VD+ – The positive digital supply. Digital Ground 4 DGND – Digital Ground. Positive Analog Supply 14 VA+ – The positive analog supply. Analog Ground 13 AGND – Analog ground. Power Fail Monitor 17 PFMON – The power fail monitor pin monitors the analog supply. If the analog supply does not meet or falls below PFMON’s voltage threshold, a Low-supply Detect (LSD) event is set in the status register. 12 11 10 9 8 7 6 5 4 3 2 1 13 14 15 16 17 18 19 20 21 22 23 24 AGND Analog Ground VA+ Positive Analog Supply IIN- Differential Current Input IIN+ Differential Current Input PFMON Power Fail Monitor E3 High Frequency Energy Output RESET Reset INT Interrupt E1 Energy Output 1 SDI Serial Data Input XIN Crystal In E2 Energy Output 2 VREFIN Voltage Reference Input VREFOUT Voltage Reference Output VIN- Differential Voltage Input VIN+ Differential Voltage Input MODE Mode Select CS Chip Select SDO Serial Data Ouput SCLK Serial Clock DGND Digital Ground VD+ Positive Digital Supply CPUCLK CPU Clock Output XOUT Crystal Out |
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