ATF22V10CZ-15XC View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'ATF22V10CZ-15XC' PDF : 20 Pages View PDF
ATF22V10C(Q)Z
with vectors is compiled. Once downloaded, the JEDEC file preload sequence will be done auto-
matically by most of the approved programmers after the programming.
5. Electronic Signature Word
There are 64 bits of programmable memory that are always available to the user, even if the
device is secured. These bits can be used for user-specific data.
6. Security Fuse Usage
A single fuse is provided to prevent unauthorized copying of the ATF22V10CZ/CQZ fuse pat-
terns. Once programmed, fuse verify and preload are inhibited. However, the 64-bit User
Signature remains accessible. The security fuse should be programmed last, as its effect is
immediate.
7. Programming/Erasing
Programming/erasing is performed using standard PLD programmers. See CMOS PLD Pro-
gramming Hardware & Software Support for information on software/programming.
Figure 7-1. Programming/Erasing Timing
VRST
POWER
t PR
REGISTERED
OUTPUTS
CLOCK
tS
tW
Table 7-1.
Parameter
TPR
VRST
Programming/Erasing
Description
Power-up
Reset Time
Power-up
Reset Voltage
Typ
Max
Units
600
1000
ns
3.8
4.5
V
8. Input and I/O Pull-ups
All ATF22V10CZ/CQZ family members have internal input and I/O pin-keeper circuits. There-
fore, whenever inputs or I/Os are not being driven externally, they will maintain their last driven
state. This ensures that all logic array inputs and device outputs are at known states. These are
relatively weak active circuits that can be easily overridden by TTL-compatible drivers (see input
and I/O diagrams below).
7
0778J–PLD–11/07
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