 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
C161 Datasheet(PDF) 174 Page - Infineon Technologies AG |
|
|
|||||||||||||||||||||||||||||
C161 Datasheet(HTML) 174 Page - Infineon Technologies AG |
|
|
174 / 400 page  &3, 7KH([WHUQDO%XV ,QWHUIDFH User’s Manual 9-10 1999-08 CS Signal Generation During external accesses the EBC can generate a (programmable) number of CS lines on Port 6, which allow to directly select external peripherals or memory banks without requiring an external decoder. The number of CS lines is selected during reset and coded in bit field CSSEL in register RP0H (see table below). The CSx outputs are associated with the BUSCONx registers and are driven active (low) for any access within the address area defined for the respective BUSCON register. For any access outside this defined address area the respective CSx signal will go inactive (high). At the beginning of each external bus cycle the corresponding valid CS signal is determined and activated. All other CS lines are deactivated (driven high) at the same time. Note: The CSx signals will not be updated for an access to any internal address area (i.e. when no external bus cycle is started), even if this area is covered by the respective ADDRSELx register. An access to an on-chip X-Peripheral deactivates all external CS signals. Upon accesses to address windows without a selected CS line all selected CS lines are deactivated. The chip select signals allow to be operated in four different modes (see table below) which are selected via bits CSWENx and CSRENx in the respective BUSCONx register. Table 9-4 Decoding of Chip Select Lines CSSEL Chip Select Lines Note 1 1 Five: CS4...CS0 Default without pull-downs 1 0 None Port 6 pins free for IO 0 1 Two: CS1...CS0 0 0 Three: CS2...CS0 Table 9-5 Chip Select Generation Modes CSWENx CSRENx Chip Select Mode 0 0 Address Chip Select (Default after Reset) 0 1 Read Chip Select 1 0 Write Chip Select 1 1 Read/Write Chip Select |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
