MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 42

• 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

indicates that when the least signiÞcant bit of the address nibble is a 0, then eoc data is being transmitted.
In ANSI terminology, the address nibble is referred to as the address/message indicator.
The software on the MC145572EVK only responds to eoc addresses of 000 or 111, the broadcast address.
The message bit must be a 1 and only the seven ANSI deÞned eoc commands are supported. These are,
in hexadecimal:
For example: with the default eoc address nibble equal to 1, the MC145572EVK would load 150 into the
LT U-Interface Transceiver nibble register 6 when menu item C is selected. This would be loaded into the
LT U-Interface Transceiver eoc framer register, R6, and transmitted to the NT1.
The menu permits a new default value to be selected for the eoc address nibble. This is menu item J. The
software also permits a custom eoc message to be concatenated with the current default eoc address
nibble. This is done by selecting menu item H. After the custom eoc message has been entered, it is
concatenated with the current default eoc address nibble and the 12 bits are loaded into the LT U-Interface
Transceiver eoc framer register, R6, and transmitted to the NT1.
EXAMPLE 1
MC145572EVK:
NTLT>eoc
eoc commands sent from LT
B1 Loopback....OFF
B2 Loopback....ON
D Loopback....OFF
Last eoc sent: FFF
eoc commands received at NT
B1 Loopback....OFF
B2 Loopback....ON
D Loopback....OFF
50
51
52
53
54
FF Return NT1 to normal operation
00
Loop-back 2B+D channels at NT1
Loop-back B1 channel at NT1
Loop-back B2 channel at NT1
Request corrupted crc to be sent from NT1 to LT
Notify NT1 of incoming corrupt crc from LT
Hold NT1 in current state
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Request corrupt crc.....OFF
Notify corrupt crc......OFF
NT1 hold state..........OFF
Last eoc received:
Request corrupt crc.....OFF
Notify corrupt crc......OFF
NT1 hold state..........OFF
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MC145572EVK
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