| ??? 07/18/07 13:45 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#141999 - P89V P89C Responding to: ???'s previous message |
Putting in to serial UART ISP programming mode
=============================================== i) The P89C uses the /PSEN = low just after POR ii) The P89V looks for U' characters down the Rx of UART for 400mS (11.0592MHz Xtal) just after POR (power on reset). Both can be programmed by Flash Magic and both have simple hardware connected to the serial port to let Flash Magic control to set programming mode. a) RESET and /PSEN for the P89C b) RESET for the P89V See the the Flash Magic user manual. I have converted from P89C to P89V - perhaps knowing the 80c51 core and the "detailed" differences - it can be done readily easily. Joe |
| Topic | Author | Date |
| P89CV51Rx2 XRAM bug? | 01/01/70 00:00 | |
| @Ri or @dptr? | 01/01/70 00:00 | |
| @dptr | 01/01/70 00:00 | |
| P89v51 <--> P89C51 differences | 01/01/70 00:00 | |
| Oh sorry I mis-read | 01/01/70 00:00 | |
| What is the full part No of the C51RB2? | 01/01/70 00:00 | |
| P89C51RB2BA & internal XRAM | 01/01/70 00:00 | |
| what is "the CV51 solution" ? | 01/01/70 00:00 | |
| isp entry on /PSEN - as with the old \'C51Rx2 | 01/01/70 00:00 | |
| maybe, maybe not | 01/01/70 00:00 | |
| P89V P89C | 01/01/70 00:00 | |
| CV51 solution | 01/01/70 00:00 | |
| the old errors... | 01/01/70 00:00 | |
| OK, I found the first error in the new datasheet.. | 01/01/70 00:00 | |
| whoever wrote that datasheet... | 01/01/70 00:00 | |
Jan is close! | 01/01/70 00:00 |