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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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6.0 Basic Operation  
CN8478/CN8474A/CN8472A/CN8471A  
6.3 Channel Operation  
Multichannel Synchronous Communications Controller (MUSYCC™)  
The components of the Transmit Time Slot map are listed in Table 6-8.  
Table 6-8. Example—Components of Transmit Time Slot Map – Channel 0  
Descriptor  
Component of Descriptor  
Value of Components  
Time Slot  
Map  
TSEN3/7  
CH3/7  
4 = Time slot enabled w/ 64 kbps mode  
2 = Logical channel 2  
TSEN2/6  
CH2/6  
4 = Time slot enabled w/ 64 kbps  
2 = Logical channel 2  
TSEN1/5  
CH1/5  
7 = Time slot enables subchannel mode w/ first bit  
1 = Logical channel 1  
TSEN0/4  
CH0/4  
4 = Time slot enabled w/ 64 kbps mode  
0 = Logical channel 0  
6.3.10 Transmit Subchannel Map  
/* each subchannel descriptor is made up of 2 dwords */  
/* dword 0 defines the configuration of 1st 4 subchannel bits */  
/* dword 1 defines the configuration of 2nd 4 subchannel bits */  
/* for demonstration, assign each byte separately */  
/* for this example, only logical channel 1 is being subchanneled */  
/* dword 0 and 1, for logical channel 0 */  
/* dword 2 and 3, for logical channel 1 */  
/* dword 4 and 5, for logical channel 2 */  
GroupStr0.TxSubchannelMap[4] = 0; /* zero it out for demo purposes */  
GroupStr0.TxSubchannelMap[5] = 0; /* zero it out for demo purposes */  
/* time slot 1, bit-0 enabled and assigned to channel 1 in time slot map */  
/* time slot 1, bit-1 enabled and assigned to channel 1 in subchannel map */  
GroupStr0.TxSubchannelMap[4] |= 0x00008100;  
/* time slot 1, bit-2 enabled and assigned to channel 1 in subchannel map */  
GroupStr0.TxSubchannelMap[4] |= 0x00810000;  
/* time slot 1, bit-3 enabled and assigned to channel 1 in subchannel map */  
GroupStr0.TxSubchannelMap[4] |= 0x81000000;  
/* either write directly into MUSYCC register - or - use a service request */  
*(MUSYCC_FUNC_0_BAR + TX_SUBCHANNEL_MAP_OFFSET + 4) =  
GroupStr0.TxSubchannelMap[0];  
*(MUSYCC_FUNC_0_BAR + TX_SUBCHANNEL_MAP_OFFSET + 5) =  
GroupStr0.TxSubchannelMap[0];  
/* note +4 and +5 dword offsets into the subchannel map are for channel 1 bits  
*/  
/* the value for the 4th dword becomes Tx Subchannel Map = 0x81818100 */  
/* the value for the 5th dword becomes Tx Subchannel Map = 0x00000000 */  
6-16  
Conexant  
100660E  
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