 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
Z80 Datasheet(PDF) 133 Page - Zilog, Inc. |
|
|
|||||||||||||||||||||||||||||
Z80 Datasheet(HTML) 133 Page - Zilog, Inc. |
|
|
133 / 330 page  < %27 2GTKRJGTCNU 7UGT /CPWCN UM008101-0601 Direct Memory Access Read Status Byte This command causes the next CPU read of the DMA to access the status byte, which is the first read register. Initiate Read Sequence This command initializes access to a repeatable series of reads that follow the sequence defined in the read mask. These commands are described in the immediately preceding pages, and Figure 46 illustrates the read mask. As mentioned in the description of these commands, the reading of registers do not need to be contiguous in time with these write commands or with other CPU read instructions accessing registers in the same read sequence. Two other commands are also related to the read registers: Reinitialize Status Byte This command reinitializes bits 4 and 5 of the status byte to 1s. Read Mask Follows This command allows the read mask to be programme. Figure 47 illustrates more clearly the group of the seven read registers in relation to the write registers. The read registers include: Status Byte (RR0) The status byte can be read independently from the other read registers and two of its bits can be reinitialized to identify end-of-block and match bytes. The bits in the status byte are defined as follows: |
|
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
