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.
Winbond W29C020/040 Operation
This chip has two boot blocks with lockout feature. This feature can
be enabled by setting the bit0(the first boot block) or the bit7(the last
boot block) in the programmer's Protect-Setting-Byte(PSB). The other
bits(bit1..6) are don't-care.
Before writing, all the slaves will be unlocked and erased. After the
contents of master IC has been copied into the slaves, the boot block
will be locked according to its bit status in the PSB byte.('1' for lock, '0'
for no-lock)
The VERIFY command will compare the content of all salves with
the master device first, and then compare their lock status with the PSB
setting. Only those which has both comparison passed will be
recognized as a good one.
7. Operation examples
7-1 Copying 27256 EPROMs:
step1:
[PROM8908D/E]:
Select the correct device name by deprNAME[key2 + key3]
or -NAME[key1 + key2].
[PROM8908F]:
15
