| ??? 03/17/05 07:41 Read: times |
#89851 - exactly Responding to: ???'s previous message |
hi,
Phillip M Gallo said:
Since you have a "budget" for a few "74XX" packages have you ruled out use of register file chips (i.e. 74hct670) as a poor man's dual port? In past, before starting the usage of CPLD, we have connected two MCU with high-speed parallel memory-mapped interface. It was done with four 670 connected as dual-port: 
With this way, each MCU talks with other by 4 bytes in XDATA space at addresses 0x0000, 0x0100, 0x0200 and 0x0300 (so simple MOVX is used). Then program protocol was not hard to be made. Regards, Oleg |
| Topic | Author | Date |
| Contemplating multiprocessor | 01/01/70 00:00 | |
| fifo | 01/01/70 00:00 | |
| and also | 01/01/70 00:00 | |
| multiprocessor communication | 01/01/70 00:00 | |
| ACKs | 01/01/70 00:00 | |
| You want it all and you want it for free | 01/01/70 00:00 | |
| Why not HW I2C or SPI | 01/01/70 00:00 | |
| Why not HW I2C or SPI | 01/01/70 00:00 | |
| USB ??? | 01/01/70 00:00 | |
| USB !!! | 01/01/70 00:00 | |
| USB | 01/01/70 00:00 | |
| You Correct Sir | 01/01/70 00:00 | |
| USB != I2C | 01/01/70 00:00 | |
USB > I2C | 01/01/70 00:00 | |
| do not multimaster | 01/01/70 00:00 | |
| hmm | 01/01/70 00:00 | |
| concurrence | 01/01/70 00:00 | |
| This is why | 01/01/70 00:00 | |
| depends on data rate | 01/01/70 00:00 | |
| Normally | 01/01/70 00:00 | |
| Are You Sure | 01/01/70 00:00 | |
| I would be | 01/01/70 00:00 | |
| I would be | 01/01/70 00:00 | |
| it works for me | 01/01/70 00:00 | |
| Are You Sure | 01/01/70 00:00 | |
| IIC speed - no limit | 01/01/70 00:00 | |
| nixed by other team members | 01/01/70 00:00 | |
| Multi-Proc Xface | 01/01/70 00:00 | |
| exactly | 01/01/70 00:00 | |
| Shift register (Mode 0)? | 01/01/70 00:00 | |
| Time savers | 01/01/70 00:00 |