| ??? 02/20/08 17:39 Read: times |
#151217 - For sure.....the multi-port job.... Responding to: ???'s previous message |
Like I said every type has its uses....or else the manufacturers would probably stop making them.
I made a board with a compact flash card socket and a 32K SRAM buffer chip and used an "8-porter", as Erik is calling them, because I wanted to have very fast bus speed access to the SRAM and the FLASH card to keep the I/O speeds reasonable. It would be unthinkable how slow it would be to use a couple of I2C port expanders to manipulate the interface lines of an SRAM in order to read and write to the memory for transferring 512 byte blocks of data that came from the CF card. Michael Karas |
| Topic | Author | Date |
| lots of i/o | 01/01/70 00:00 | |
| There are 16-bit Expanders | 01/01/70 00:00 | |
| The + and - of the slave processor | 01/01/70 00:00 | |
| the logical solution is to ... | 01/01/70 00:00 | |
| Roll 'yer own, and get exactly what you want | 01/01/70 00:00 | |
| why bother | 01/01/70 00:00 | |
| you're right, if "conventional" I/O ports are OK | 01/01/70 00:00 | |
| Max 7301 | 01/01/70 00:00 | |
| lots of i/o part 2 | 01/01/70 00:00 | |
| Theres a 40way NXP I/O expander | 01/01/70 00:00 | |
| Simple Distributed Concept | 01/01/70 00:00 | |
| very valid point | 01/01/70 00:00 | |
| For sure.....the multi-port job.... | 01/01/70 00:00 | |
| lots of i/o part 3 | 01/01/70 00:00 | |
| I love slave processors | 01/01/70 00:00 | |
MCP23008 | 01/01/70 00:00 |