Cirrus Logic CS8130 - Manual (Page 25)

Power Supplies
VD+ - Digital Positive Supply.
Digital positive supply voltage. Nominally +3V
VA+ - Analog Positive Supply.
Analog positive supply voltage. Nominally +3V.
DGND - Digital Ground.
Digital ground, 0V, connection.
AGND - Analog Ground.
Analog ground, 0V, connection.
TGND1, TGND2 - Transmitter Grounds.
LED Transmitter grounds, 0V, connections.
Analog Pins
LED1C, LED2C - Transmit LED Cathode.
These pins are connected to the transmit LED cathode via resistors. Appropriate resistor choice
allows user setting of LED current options. The anode of the LED is connected to the positive
supply.
PINC - Receiver PIN Diode Cathode
Receiver PIN diode cathode.
PINA - Receiver PIN Diode Anode.
Receiver PIN diode anode.
LED1 CATHODE LED1C DGND DIGITAL GROUND
TRANSMIT GROUND 1 TGND1 EXTCLK EXTERNAL CLOCK
TRANSMIT GROUND 2 TGND2 XTALOUT CRYSTAL OUTPUT
LED2 CATHODE LED2C XTALIN CRYSTAL INPUT
ANALOG GROUND AGND FORM/BSY FORMAT/BUSY
PIN DIODE ANODE PINA D/C DATA/CONTROL
PIN DIODE CATHODE PINC TXD TRANSMIT DATA
ANALOG SUPPLY VA+ RXD RECEIVE DATA
CLOCK FREQUENCY CLKFR VD+ DIGITAL SUPPLY
POWER DOWN PWRDN RESET RESET
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CS8130
DS134PP2 25
CS8130
DS134F1 25