欢迎访问ic37.com |
会员登录 免费注册
发布采购

BT8375EPF 参数 Datasheet PDF下载

BT8375EPF图片预览
型号: BT8375EPF
PDF下载: 下载PDF文件 查看货源
内容描述: 单芯片收发器T1 / E1和综合业务数字网( ISDN )基本速率接口 [single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces]
分类和应用: 电信集成电路综合业务数字网
文件页数/大小: 323 页 / 1950 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
 浏览型号BT8375EPF的Datasheet PDF文件第209页浏览型号BT8375EPF的Datasheet PDF文件第210页浏览型号BT8375EPF的Datasheet PDF文件第211页浏览型号BT8375EPF的Datasheet PDF文件第212页浏览型号BT8375EPF的Datasheet PDF文件第214页浏览型号BT8375EPF的Datasheet PDF文件第215页浏览型号BT8375EPF的Datasheet PDF文件第216页浏览型号BT8375EPF的Datasheet PDF文件第217页  
Bt8370/8375/8376  
Fully Integrated T1/E1 Framer and Line Interface  
3.16 Data Link Registers  
0A7RDL #1 FIFO Fill Control (RDL1_FFC)  
7
6
5
4
3
2
1
0
MSG_FILL[1]  
MSG_FILL[0]  
FFC[5]  
FFC[4]  
FFC[3]  
FFC[2]  
FFC[1]  
FFC[0]  
MSG_FILL[1:0]  
Unformatted Message Fill LimitApplicable only for Pack8 and Pack6 modes, the message  
fill limit selects how many receive FIFO locations [RDL1; addr 0A8] are filled before the  
receive data link generates an RFULL interrupt [ISR2; addr 009] and generates a  
corresponding RDL1 Partial message status word entry. Fill limit determines how many bytes  
constitute an unformatted message, and also gives the processor an alternative to using  
RNEAR interrupts to signal the end of a received unformatted message.  
The number of bits per unformatted message must divide evenly by the number of bits  
monitored per multiframe. For example, SLC applications monitor Fs-bits during even frames  
for a total of 36 bits monitored out of 72 frames. Using Pack6 mode, that group of 36 Fs-bits  
from each SLC multiframe can be chosen to constitute one unformatted message by selecting a  
message fill limit which equals 6 bytes (of 6 bits/byte). In the SLC example, an RFULL  
interrupt would be generated every 9 ms on each SLC multiframe boundary. Fill limits  
provided for T1 cases are multiples of 6 bytes (i.e., 6, 12 or 18 FIFO locations) to hold one or  
more multiframes of monitored data. In E1 mode, fill limits are specified in multiples of 8  
bytes to correspond with the 16-frame multiframe lengths (i.e., monitoring CRC4 in MFAS  
framing mode, or monitoring TS16 in CAS framing mode).  
T1/E1N  
MSG_FILL[1:0]  
Message Fill Limit  
Disabled  
8 bytes  
X
0
0
0
1
1
1
00  
01  
10  
11  
01  
10  
11  
16 bytes  
24 bytes  
6 bytes  
12 bytes  
18 bytes  
N8370DSE  
Conexant  
3-95