TO HOME PAGEAtmel AT80C1051/2051 Operation Note:
The setting of the Lock bits are stored in the Protect-Setting-Byte(PSB) of the programmer. This value 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 | x | x | x | LB2 | LB1 | x |
1. VERIFY: 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 slave ICs will be compared with the master contents.
2. COPY: Erase all slaves first, copy the contents of the master, then set the Lock bits in all slaves according to the bits stored in the PSB. At the last, a VERIFY command was executed.
3. DOWNLOAD: Erase the slaves first, transfer data to the slaves's memory array, then set the Lock bits in all slaves according to the bits stored in PSB.