TO HOME PAGEAtmel AT90S1200 operation Note:
The setting of the Lock and Fuse bits are stored in the Protect-Setting-Byte (PSB) of the programmer. It also control some command's (COPY, VERIFY and DOWNLOAD) operation.
The followings explain each bit's meaning and location. Please pay attention that the programmer doesn't use any of these information stored in the master IC.
| BIT | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| ¡@ | x | x | SPI | x | x | LB2 | LB1 | RCE |
1. CHECKSUM: Show the checksum of the Flash memory portion in the master IC. Its Fuse and Lock bits information also be shown in [xx] format.
2. VERIFY: First, comapres the Fuse and Lock bits of all the slaves with the settings in PSB. Second, if the Lock bits is set to the "read suppress", all slave ICs will be verified with value $FF to comfirm this setting. If it's not, all slaves will be compared with the master's contents(the flash portion).
3. COPY: Erase all the slaves, copy the flash portion of the master IC, and then set the Fuse and Lock bits according to the value stored in PSB. At last, execute a VERIFY command.
4. DOWNLOAD: Erase all the slaves, transfer data to the slaves' flash portion, then set the Fuse and Lock bits according to the value stored in PSB.