MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 21

• 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

A: External Hardware IDL Loop-Back on NT1 Side.
Place a jumper between BNC J18 NTRXDATA and BNC J20. Then, from the NT/LT activation menu, select
option I or C. Or, from the command line interface, disable the S/T-Interface Transceiver by setting NR0(b3)
of the MC145574 to a 1. The MC145574 can also be removed from the board.
B: IDL Loop-Back Internal to S/T-Interface Transceiver.
This loop-back may be implemented either from the NT/LT activation menu or directly from the command
line interface. From the NT/LT activation menu, select option B or H. From the command line interface,
enable a 2B+D IDL loop-back in the S/T-Interface Transceiver by setting NR6(b3) of the MC145574 to a 1.
MC145572EVK
22
BERTCLK
A
IDL
S/T
GENERATOR
S/T-INTERFACE
TRANSCEIVER
MC145574
GATED
CLOCK
ISDN
B
C
Figure 2-8. Loop-Back Modes for the MC145572EVK
Freescale Semiconductor, Inc.
D
For More Information On This Product,
TRANSCEIVER
U-INTERFACE
MC145572
ISDN
Go to: www.freescale.com
MICROCONTROLLER
MC68HC705
MC145407
E
RS-232
U-LOOP
F
TRANSCEIVER
U-INTERFACE
MC145572
ISDN
G
H
GENERATOR
GENERATOR
REFERENCE
SOURCE
CLOCK
CLOCK
GATED
CLOCK
5 ppm
EXT CLK
I
IDL
BERTCLK
SCP