CDB61310 Cirrus Logic, Inc., CDB61310 Datasheet - Page 5

• Manufacturer Part Number: CDB61310
• Description: T1/e1 Line Interface Units
• Manufacturer: Cirrus Logic, Inc.

8. PROTOTYPING AREA
A prototyping area with power supply and ground
connections is provided on the evaluation board.
This area can be used to develop and test a variety
of additional circuits such as framer devices, sys-
tem synchronizer PLLs, or specialized interface
logic.
9. EVALUATION HINTS
1) The orientation of pin 1 for the CS61310 is
2) Component locations R1-R4, Y1, T1 and T2
DS440DB2
HDR4
HDR5
HDR6
HDR7
HDR8
HDR9
HDR10
HDR11
HDR12
Jumper
marked by a small circle on the top-left side of
the socket U1.
must have the correct values installed accord-
ing to the application. All the necessary compo-
nents are included with the evaluation board.
NLOOP_LED Hardware Mode operation, connects NLOOP pin to the LED
XTAL-GND
Position
XTAL-HI
MCLK
GND
OUT
INT
IN
IN
IN
IN
IN
X
Grounds TRING on the line side of the transmit transformer
Grounds the line side of RRING through C2
Host Mode operation, connects INT pin to the serial interface
Grounds the MCLK pin
Connects the MCLK pin to the BNC
Pulls the TNEG pin high, for selecting the coder mode (TCLK has to be present to
select Coder Mode)
Pulls the pin XTALIN high
Pulls the pin XTALIN to ground
Must be shorted for Host Mode (TAOS/CLKE pin) or Hardware Mode (for DIP switch).
Allows S2 to pull RLOOP and LLOOP high for RESET in Hardware Mode
Allows S2 to pull RLOOP, LLOOP, and TAOS high for enabling NLOOP in hardware mode
Not a jumper: provides access to the serial port signals plus signal grounds for cable.
Table 3. Jumper Selections
3) Closing a DIP switch on SW1 sets the CS61310
4) When performing a manual loopback of the re-
5) A jumper can be placed on header HDR4 to
Properly terminate TTIP/TRING when evaluating
the transmit output pulse shape. For more informa-
tion concerning pulse shape evaluation, refer to the
Crystal application note AN07 entitled "Measure-
ment and Evaluation of Pulse Shapes in T1/E1
Transmission Systems."
control pin of the same name to logic 1.
covered signal to the transmit signal at the BNC
connectors, the recovered data must be valid on
the falling edge of RCLK to properly latch the
data in the transmit direction.
provide a ground reference on TRING.
Selection
CDB61310
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