MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 45

• Manufacturer Part Number: MC145572APB
• Description: IC ISDN INTERFACE TXCVER 44-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC145572APB

• Protocol: RS232
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Lead Free Status / Rohs Status: Not Compliant

MC145572EVK after invoking any of the LPU commands. Each U-Interface Transceiver can be
independently put into analog loop-back.
The echo canceller loop-back is an external analog loop-back where data received on the U-Interface
Transceiver IDL Rx pin is framed up and then transmitted as 2B1Q symbols. The 2B1Q symbols are
received by the U-Interface Transceiver and cancelled by the echo canceller. Only the echo cancellers are
enabled during this mode. When the U-Interface Transceiver is operating correctly, BR12+BR13 should
have a low value. Preferably, BR12 should be 00 and BR13 should be a low value. BR13 will continue to
ßuctuate in value slightly. BR11 should read as 10 or 11. Several seconds may elapse before the registers
reach a steady state and the correct bits are set.
MC145572EVK
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Freescale Semiconductor, Inc.
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Go to: www.freescale.com