 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
UPD70433 Datasheet(PDF) 39 Page - NEC |
|
|
|||||||||||||||||||||||||||||
UPD70433 Datasheet(HTML) 39 Page - NEC |
|
|
39 / 166 page  39 µPD70433 4. BUS CONTROL FUNCTIONS With the V55PI pin, refer to 1.1.2 (1) "Pin function for bus control". As regards pins which have an alternate function as port pins, when that function is used, the corresponding function must be selected by means of the port mode control register (PMCn). 4.1 WAIT FUNCTION The V55PI divides the basic memory space (000000H to 0FFFFFH) into a maximum of 4 blocks with a variable memory size, divides the uppermost extended memory space area (100000H to FFFFFFH) into two areas with a variable memory size, and performs wait control for each block. The memory size of each block in the basic memory space is specified by the memory block control register (MBC). Figure 4-1 shows the memory block configuration when A9H has been set for the MBC register value. Figure 4-1. Partitioned Memory Control MB31 00 00 11 00 01 11 00 01 10 11 Main Memory Space MBC Block 0 Block 1 Block 2 Block 3 Block 4 128K Bytes 256K Bytes 512K Bytes 640K Bytes 768K Bytes 896K Bytes 1M Bytes 2M Bytes 4M Bytes 6M Bytes 8M Bytes 10 01 10 01 10 11 Block 5 16M Bytes 1 MB30 0 MB21 1 MB20 0 MB11 1 MB10 1 MB01 0 MB00 1 |
|
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
