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CN8474AEBG 参数 Datasheet PDF下载

CN8474AEBG图片预览
型号: CN8474AEBG
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: 通信控制器电信集成电路
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  
6.3.3 Global Configuration Descriptor  
/* CLOCK activity indicators - read only, writes are ignored */  
/* MPU control - assume EBUS is not used and default values are fine */  
/* PORTMAP = 0, PORT 0 mapped to CHANNEL GROUP 0 */  
GroupStr0.GlobalConfigDescr = 0x00000000;  
/* either write directly into MUSYCC register - or - use a service request */  
*(MUSYCC_FUNC_0_BAR + GLOBAL_CONFIG_DESCR_OFFSET) =  
GroupStr0.GlobalConfigDescr;  
The components of the Global Configuration Descriptor are listed in Table 6-2.  
Table 6-2. Example—Components of Global Configuration Descriptor  
Component of  
Descriptor  
Descriptor  
Value of Components  
Read only values. Writes are ignored.  
Global  
TXCLKACT0  
Configuration  
Descriptor  
TXCLKACT1  
TXCLKACT2  
TXCLKACT3  
RXCLKACT0  
RXCLKACT1  
RXCLKACT2  
RXCLKACT3  
It would be ideal to read this descriptor first and verify that MUSYCC detects  
clocks at the Rx and Tx ports being used.  
BLAPSE  
ECKEN  
MPUSEL  
ALAPSE  
ELAPSE  
0 = Don’t care.  
0 = EBUS clock output disabled.  
0 = Motorola-style protocol supported.  
0 = Don’t care.  
0 = Don’t care.  
PORTMAP  
Use 0 where the mapping is defined as:  
Port 0 -> Channel Group 0  
Port 1 -> Channel Group 1  
Port 2 -> Channel Group 2  
Port 3 -> Channel Group 3  
100660E  
Conexant  
6-11