Cirrus-logic CS5463 Manual de usuario descargar pdf (Pagina 6)

CS5463

6 DS678F3

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

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.

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

Energy Output 2

VREFINVoltage Reference Input

VREFOUTVoltage Reference Output

VIN-Differential Voltage Input

VIN+Differential Voltage Input

MODEMode Select

CSChip Select

SDOSerial Data Ouput

SCLKSerial Clock

DGNDDigital Ground

VD+Positive Digital Supply

CPUCLKCPU Clock Output

XOUTCrystal Out

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