CS61305A-IL1 Cirrus Logic, Inc., CS61305A-IL1 Datasheet - Page 20

• Manufacturer Part Number: CS61305A-IL1
• Description: T1/E1 line interface
• 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)
20
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 (T1 operation) or 8.192 MHz (E1 operation) crystal should be connected across
these pins. Overdriving the oscillator with an external clock is not supported.
A 1.544 MHz or 2.048 MHz clock signal may be input on ACLKI to calibrate the clock recovery
circuit and control the transmit clock during TAOS. If a clock is not provided on ACLKI, this
input must be grounded, and the oscillator in the jitter attenuator is used to calibrate the clock
recovery circuit and TAOS is not available. ACLKI may not be provided by RCLK.
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 (47k - 100k).
CS61305A
DS157PP3