欢迎访问ic37.com |
会员登录 免费注册
发布采购

PM8621 参数 Datasheet PDF下载

PM8621图片预览
型号: PM8621
PDF下载: 下载PDF文件 查看货源
内容描述: NSE- 8G⑩标准产品数据表初步 [NSE-8G⑩ Standard Product Data Sheet Preliminary]
分类和应用:
文件页数/大小: 184 页 / 957 K
品牌: PMC [ PMC-SIERRA, INC ]
 浏览型号PM8621的Datasheet PDF文件第142页浏览型号PM8621的Datasheet PDF文件第143页浏览型号PM8621的Datasheet PDF文件第144页浏览型号PM8621的Datasheet PDF文件第145页浏览型号PM8621的Datasheet PDF文件第147页浏览型号PM8621的Datasheet PDF文件第148页浏览型号PM8621的Datasheet PDF文件第149页浏览型号PM8621的Datasheet PDF文件第150页  
NSE-8G™ Standard Product Data Sheet  
Preliminary  
Example: Suppose one wishes to change the cross bar to map DIN[10][12:0] to DOUT[6][12:0]  
for just the 4097th byte of the frame and wishes to keep all other mappings of the 4097th byte the  
same.  
Steps:  
1. CPU writes 0x8a061000 to the DCB Access Mode register (i.e., WRB=1, ACCMDE=0,  
PORTCFG[4:0]=0x0A, PORTADDR[4:0]=0x06, WORDADDR[13:0]=0x1000).  
°
°
°
Causes MUX B to switch in PORTCFG at port 6.  
Causes MUX C to switch in MUX B.  
Triggers a read from offline memory connection page at location 0x1000.  
2. Wait four SYSCLK cycles.  
3. Writes 0x0a061000 to the DCB Access Mode register (i.e., WRB=0, ACCMDE=0,  
PORTCFG[4:0]=0x0A, PORTADDR[4:0]=0x06, WORDADDR[13:0]=0x1000).  
°
°
°
Causes MUX B to switch in PORTCFG at port 6.  
Causes MUX C to switch in MUX B.  
Triggers a write from register D to offline connection memory page at location 0x1000.  
4. Wait four SYSCLK cycles before returning to step 1 to perform another mapping change.  
12.6.2 Configuring the DCB using Word transfer mode:  
In word transfer mode, the microprocessor updates the entire word of offline connection memory  
page. The steps to perform a word transfer is shown in the following example:  
Example: Suppose one wishes to change the entire cross bar mapping from DIN to DOUT for just  
the 4097th byte of the frame.  
Steps:  
1. CPU writes new mapping to the Configuration 31-30 Port register.  
2. CPU writes new mapping to the Configuration 29-24 Port register.  
3. CPU writes new mapping to the Configuration 23-18 Port register.  
4. CPU writes new mapping to the Configuration 17-12 Port register.  
5. CPU writes new mapping to the Configuration 11-6 Port register.  
6. CPU writes new mapping to the Configuration 5-0 Port register .  
7. CPU write 0x40001000 to the DCB Access Mode register.  
°
Causes Mux C to switch in WORDCFG.  
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use  
Document ID: PMC-2010850, Issue 1  
145