| ??? 02/20/08 00:47 Read: times |
#151183 - you're right, if "conventional" I/O ports are OK Responding to: ???'s previous message |
I often pay as little as $1.50 for an 84-pin PLCC (EPM7128SLC84) with 64 I/O's and 4 additional dedicated inputs, plus 4 JTAG pins. That's pretty handy in light of the fact that it provides 128 macrocells. While you can often find 'em on ebay for $1.50-%2.00US, distributors want 8-10x that much. From time to time, they're available at low cost, so I buy 'em now ang then.
I like the XILINX XC95144, too, as it's not terribly costly either. The good part is that you're not locked into one or another protocol, as you can build your own host interface, which leads to much more flexibility. Since the O/P wants only 32 bits in and 32 bits out, on the same pins, he can make one of the 8-porters work just fine, I believe. That Max7301 costs $2.55 in 1k units. If that's not too scary for its 28 bits of I/O, it's probably OK as well. RE |
| 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 |