MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 32

• 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

Parallel or Serial Control Port operation.
and reverse polarity conditions.
2.7.4
This DIP switch is used to conÞgure operation of the LT side of the MC145572EVK. In particular, the
MC145572 U-Interface Transceiver is conÞgurable for IDL or GCI operation, master or slave timing mode,
2.8
The MC145572EVK is a + 5 V only board that pulls approximately 250 mA while activated and operating
in the combined NT1/LT mode. It is recommended that a 5 V supply with a 1 A minimum current capability
be used.
Power supply connections are made to the terminals marked + 5 V and GND on J19. The terminal marked
ÒALTÓ is reserved for future use.
One 1N5339A ÒD28Ó 5 watt zener regulator diode (5.6 V) protects the MC145572EVK from over voltage
DIP Switch
S2-1
S2-2
S2-3
S2-4
S2-5
S2-6
S2-7
POWER SUPPLY
LT Side Configuration DIP Switch S7
Open
RF
MAS
IDL2
FSR
Ñ
8
on
Function
FSX=FSR
RF=FSR
Closed
RF
SLV
GCI
10
off
Freescale Semiconductor, Inc.
Figure 2-9. Power Connector Pin Assignments
For More Information On This Product,
Selects between on-board and off-board 8 kHz clock reference applied to the
FREQREF pin of the LT side MC145572. When open, this switch selects the on-board
5 ppm reference. When closed, the signal at JP26-3 is applied to FREQREF. See
S7-8 description.
Selects the level on the M/S pin to the NT1 U-Interface Transceiver. MC145572 is the
timing master.
Connects the FSR and FSX pins of the NT side MC145572 when closed. Use only in
slave mode.
Selects 10- or 8-bit mode gated IDL clock outputs for use with a bit error analyzer on
the NT1 side when the MC145572 is conÞgured for MCU mode operation.
Selects between MCU or GCI operation for the LT side U-transceiver. When open, the
MC145572 is conÞgured for MCU operation and the time division multiplexed bus
interface to the MC145572 is in the IDL2 mode. When closed, the MC145572 is
conÞgured for GCI operation and all 2B+D and control/status information is
transferred over the GCI interface.
When closed, this switch connects the FSR signal of the LT side MC145572 to the
EXTFREF, the external frequency reference input. S2-1 must also be in the closed
position.
Not Used.
Table 2-9. LT Side ConÞguration DIP Switch S2
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+ 5 V
GND
ALT
Description
MC145572EVK
RF=FSR
Factory
Setting
RF on
MAS
IDL2
FSR
10
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