| ??? 10/22/09 12:10 Modified: 10/22/09 12:13 Read: times |
#169973 - Not possible in software for P89C51RD2 Responding to: ???'s previous message |
Oops. I now see that your question is for the 'V' version.
From the 89C51RD2 data sheet, under OSCILLATOR CHARACTERISTICS This device is configured at the factory to operate using 6 clock periods per machine cycle, referred to in this datasheet as “6 clock mode”. (This yields performance equivalent to twice that of standard 80C51 family devices). It may be optionally configured on commercially-available EPROM programming equipment to operate at 12 clocks per machine cycle, referred to in this datasheet as “12 clock mode”. Once 12 clock mode has been configured, it cannot be changed back to 6 clock mode. So you cannot get 12 clocks via software on the C version, I have not got a 'V' chip. David. |
| Topic | Author | Date |
| 89v51rd2(NXP)switching clock 12 to 6 through software | 01/01/70 00:00 | |
| Not possible in software for P89C51RD2 | 01/01/70 00:00 | |
| not switchable | 01/01/70 00:00 | |
| switch 12 to 6clock mode using IAP for P89V51RD2 | 01/01/70 00:00 | |
| one-way function | 01/01/70 00:00 | |
| 12 to 6clock is a One Time action for P89V51RD2 | 01/01/70 00:00 | |
| You may well be right | 01/01/70 00:00 | |
12 to 6 clock, and documentation | 01/01/70 00:00 |