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CN8474AEPF 参数 Datasheet PDF下载

CN8474AEPF图片预览
型号: CN8474AEPF
PDF下载: 下载PDF文件 查看货源
内容描述: 多通道同步通信控制器( MUSYCC ™ ) [Multichannel Synchronous Communications Controller (MUSYCC?)]
分类和应用: 通信控制器
文件页数/大小: 221 页 / 2104 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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CN8478/CN8474A/CN8472A/CN8471A  
6.0 Basic Operation  
Multichannel Synchronous Communications Controller (MUSYCC™)  
6.3 Channel Operation  
6.3.8 Message Length Descriptor  
/* maximum frame length register 2 = 0x200 */  
/* maximum frame length register 1 = 0x400 */  
GroupStr0.MessageLengthDescr = 0x02000400;  
/* either write directly into MUSYCC register - or - use a service request */  
*(MUSYCC_FUNC_0_BAR + MESSAGE_LENGTH_DESCR_OFFSET) =  
GroupStr0.MessageLengthDescr;  
The components of the Message Length Descriptor are listed in Table 6-7.  
Table 6-7. Example—Components of Message Length Descriptor  
Descriptor  
Component of Descriptor  
MAXFRM2  
MAXFRM1  
Value of Components  
Message  
Length  
Descriptor  
0x200, register 2 to 512 octets  
0x400, register 1 to 1024 octets  
6.3.9 Transmit Time Slot Map—Channel 0  
/* each time slot descriptor contains 4 time slot assignments */  
/* each byte in the dword descriptor is a time slot assignment */  
/* byte 0/dword 0 is for time slot 0 */  
/* byte 1/dword 0 is for time slot 1 */  
/* byte 2/dword 0 is for time slot 2 */  
/* byte 3/dword 0 is for time slot 3 */  
/* for demonstration, assign each byte separately */  
GroupStr0.Txtime slotMap[0] = 0; /* zero it out for demo purposes */  
/* time slot 0, channel number assigned = 0 */  
/* time slot 0, time slot enabled code = 4, enabled and 64 kbps */  
GroupStr0.Txtime slotMap[0] |= 0x00000080;  
/* time slot 1, channel number assigned = 1 */  
/* time slot 1, time slot enabled code = 7, subchannel w/ 1st bit active */  
GroupStr0.Txtime slotMap[1] |= 0x0000D100;  
/* time slot 2, channel number assigned = 2 */  
/* time slot 2, time slot enabled code = 4, enabled and 64 kbps */  
GroupStr0.Txtime slotMap[2] |= 0x00820000;  
/* time slot 3, channel number assigned = 2 */  
/* time slot 3, time slot enabled code = 4, enabled and 64 kbps */  
GroupStr0.Txtime slotMap[3] |= 0x82000000;  
/* either write directly into MUSYCC register - or - use a service request */  
*(MUSYCC_FUNC_0_BAR + TX_time slot_MAP_OFFSET) = GroupStr0.Txtime slotMap[0];  
/* the value for the first dword becomes Tx time slot Map = 0x8282D180 */  
100660E  
Conexant  
6-15  
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