| ??? 02/19/08 22:45 Modified: 02/19/08 22:49 Read: times |
#151180 - why bother Responding to: ???'s previous message |
How about using a CPLD?
You can build the input from the MCU any way you like, and keep the bus load down to just one on P0 and P2. You could even make it serial if you have time. Why bother, an 8-porter will give him what he needs. No need to add a CPLD (board space and coding time). Before the 8-porters I did, indeed, often, add a CPLD, but since I discovered the 8-porters I have never looked back. Erik |
| 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 |