| ??? 02/20/08 17:51 Read: times |
#151220 - lots of i/o part 3 Responding to: ???'s previous message |
Hey again forum
As Erik also point out, Michael has very valid point, regard pcb layout and 8-16 bit vs. "lots of bits" devices. A have had the same thoughts, and it might end with some 16 bit i2c devices. I have - on the other hand - also been thinking expandable or stackable. A litle µc, some outputdriver, some input protection, a bcd switch (to set the device adr) and a few connctors, and you have 12 testpoints. If that isn't enough add a board, or two. Component cost and speed aren't an issue. It wil take what ver time it takes to do the test, and since we will build maybe ten units, component cost dosn't matter either. I tried googling "port expander" and saw that both cypress and xilinx has appnotes with portexpanders build on coolrunners or something like it. But then when are back in 100 pin qfp device wtih all the layout problems. I'll keep on scratching my head. ha' en go' aften Per |
| 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 |