CS61535A Cirrus Logic, Inc., CS61535A Datasheet - Page 24

• Manufacturer Part Number: CS61535A
• Description: T1-E1 Line Interface Unit for PCM applications
• Manufacturer: Cirrus Logic, Inc.

Power Supplies
RGND - Ground, Pin 22.
RV+ - Power Supply, Pin 21.
TGND - Ground, Transmit Driver, Pin 14.
TV+ - Power Supply, Transmit Driver, Pin 15.
Oscillator
XTALIN, XTALOUT - Crystal Connections, Pins 9 and 10.
Control
ACLKI - Alternate External Clock Input, Pin 1.
CLKE - Clock Edge, Pin 28. (Host Mode)
CS - Chip Select, Pin 26. (Host Mode)
INT - Receive Alarm Interrupt, Pin 23. (Host Mode)
24
Power supply ground for all subcircuits except the transmit driver; typically 0 Volts.
Power supply for all subcircuits except the transmit driver; typically +5 Volts.
Power supply ground for the transmit driver; typically 0 Volts.
Power supply for the transmit driver; typically +5 Volts. TV+ must not exceed RV+ by more than
0.3 V.
A 6.176 MHz (or 8.192 MHz) crystal should be connected across these pins. If a 1.544 MHz (or
2.048 MHz) clock is provided on ACLKI (pin 1), the jitter attenuator may be disabled by tying
XTALIN, Pin 9 to RV+ through a 1 k resistor, and floating XTALOUT, Pin 10.
Overdriving the oscillator with an external clock is not supported.
The CS61535A does not require a clock signal to be input on ACLKI when a crystal is connected
between pins 9 and 10. If a clock is not provided on ACLKI, this input must be grounded. If
ACLKI is grounded, the oscillator in the jitter attenuator is used to calibrate the clock recovery
circuit and TAOS is not available.
Setting CLKE to logic 1 causes RPOS and RNEG to be valid on the falling edge of RCLK, and
SDO to be valid on the rising edge of SCLK. Conversely, setting CLKE to logic 0 causes RPOS
and RNEG to be valid on the rising edge of RCLK, and SDO to be valid on the falling edge of
SCLK.
This pin must transition from high to low to read or write the serial port.
Goes low when LOS or DPM change state to flag the host processor. INT is cleared by writing
"Clear LOS" or "Clear DPM" to the register. INT is an open drain output and should be tied to
the power supply through a resistor.
CS61535A
DS40F1