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參數(shù)資料
| 型號(hào)： | P800-UK |
| 英文描述： | P800 PROGRAMMER (UK) |
| 中文描述： | P800的程序員（英國） |
| 文件頁數(shù)： | 14/36頁 |
| 文件大?。?/td> | 230K |
| 代理商： | P800-UK |
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P800 Operating Manual
13
2.4.2 Marginal verify testing
!
SEQ then select MARGINAL TESTING
After programming, during illegal bit test, and when the VERIFY key is pressed the device is
verified with the RAM. This can either be done at the manufacturer's recommended VCC
voltages (Marginal verify disabled), or at +/- 10% of the nominal VCC voltage (Marginal
verify enabled).
Note: The lower marginal voltage is also used during empty testing and illegal bit testing.
Select the required option using
←
and
→
, then press ENTER.
2.4.3 Electronic Identifier
!
SEQ then select ELECTRONIC ID
An Electronic Identifier exists in some EPROM and Flash devices. It can be used to check
or select a device before load/verify/empty check or program.
Three options are given: check, automatic, none.
NONE
will not check the electronic identifier unless required by the
programming algorithm.
CHECK
will check that the device(s) in the socket(s) are the same
as that selected. If not, the error message WRONG PART
will be displayed. NO SIG will be displayed if no signature
can be read from the device.
AUTOMATIC
will read the identifier and try to select the correct device
code to match. It can only select devices of the same family
as that already selected.
If different family devices are inserted then the error
message MISMATCHED PARTS will be displayed.
Select the required option using the
↑
and
↓
keys, then press ENTER.
2.4.4 Security fuses
!
SEQ then select SECURITY
Some devices have one or more security fuses, which can either secure the part, or disable
writing to it. The user can select to program them or leave them intact using the
←
and
→
keys followed by ENTER. With devices that have more than one security fuse they can be
selected using the
↑
and
↓
keys to display the other fuses, ENTER is then pressed once to
enter all the fuses.
On some EEPROMs and Flash the security feature can be used to make the device, or
blocks of the device write protected.
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