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參數(shù)資料
| 型號(hào)： | MC145572APB |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 37/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ISDN INTERFACE TXCVER 44-LQFP |
| 標(biāo)準(zhǔn)包裝： | 160 |
| 類型： | 收發(fā)器 |
| 規(guī)程： | RS232 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LQFP |
| 供應(yīng)商設(shè)備封裝： | 44-LQFP（10x10） |
| 包裝： | 托盤 |
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43
MC145572EVK
indicates that when the least signicant 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 dened eoc commands are supported. These are,
in hexadecimal:
50
Loop-back 2B+D channels at NT1
51
Loop-back B1 channel at NT1
52
Loop-back B2 channel at NT1
53
Request corrupted crc to be sent from NT1 to LT
54
Notify NT1 of incoming corrupt crc from LT
FF
Return NT1 to normal operation
00
Hold NT1 in current state
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
Request corrupt crc.....OFF
B2 Loopback....ON
Notify corrupt crc......OFF
D Loopback....OFF
NT1 hold state..........OFF
Last eoc sent: FFF
Last eoc received:
151
eoc commands received at NT
B1 Loopback....OFF
Request corrupt crc.....OFF
B2 Loopback....ON
Notify corrupt crc......OFF
D Loopback....OFF
NT1 hold state..........OFF
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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