MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 27

• 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

2.6.2
LTFREF: U1 Frequency Reference.
This is the signal at the FREQREF pin of the LT side MC145572, U1.
EXTREF: External Reference.
When DIP switch S2-1, RF
to this pin becomes the reference clock for the LT side MC145572, U1.
LTSCPEN: SCP Enable (LT U-Interface Transceiver SCP EN).
This signal, when held low, selects the Serial Control Port (SCP) for the transfer of control, status, and
data information into and out of the MC145572 U-Interface Transceiver on the LT side (U1).
SCPCLK: SCP Clock (SCP CLK).
SCPCLK is used for controlling the transfer of data into and out of the SCP registers of the U chips and
the S/T chip. Data is shifted into the device from SCPRx on rising edges of SCPCLK. Data is shifted out
of the device from SCPTx on falling edges of SCPCLK. SCPCLK can be any frequency up to 4.096 MHz.
SCPTx: SCP Transmit Output (SCP Tx).
SCPTx is used to output control, status and data information from the two MC145572 U-Interface
Transceivers and the MC145574 S/T-Interface Transceiver.
MC145572EVK
28
Pin No.
2 Ð 20
EVEN
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
1
3
5
7
9
LT Signal Header (JP26) Pin Descriptions
Silkscreen
LTIDLCLK
LTSCPEN
LTFREFO
LTGTCLK
EXTREF
SCPCLK
LTIDLRX
LTIDLTX
LTFREF
LTSFAR
LTSFAX
SCPRx
SCPTx
LTFSR
LTFSX
LTIRQ
8 KHz
GND
Ground
Output for 8 kHz Reference Clock
Input for External 8 kHz Reference Clock
SCP Enable (LT U-Interface Transceiver)
SCP Clock
SCP Transmit Output from MC145572s
SCP Receive Input to MC145572s
Interrupt Request 2 (LT U-Interface Transceiver)
IDL Clock 2 (LT U-Interface Transceiver)
IDL Receive Input (LT U-Interface Transceiver)
IDL Transmit Output (LT U-Interface Transceiver)
FSR Frame Sync (LT U-Interface Transceiver)
FSX Frame Sync (LT U-Interface Transceiver)
Output for On-Board 8 kHz Reference Clock
Receive Superframe Alignment (LT U-Interface Transceiver)
Transmit Superframe Alignment (LT U-Interface Transceiver)
Synchronized Recovered Clock Output When in GCI Mode of Operation (LT U-Interface Transceiver)
Demultiplexed Time Slot Clock Out (LT U-Interface Transceiver)
on
-RF
Freescale Semiconductor, Inc.
Table 2-4. LT Signal Header (JP9) Quick Reference
For More Information On This Product,
off
is in the RF
Go to: www.freescale.com
off
position, an external 8 kHz frequency reference applied
Functional Description