6

0778L–PLD–8/10

Atmel ATF22V10C(Q)Z

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

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 Programming Hardware

and Software Support for information on software/programming.

Figure 7-1.

Programming/Erasing Timing

Table 7-1.

Programming/Erasing

Parameter

Description

Typ

Max

Units

T

PR

Power-up

Reset Time

600

1000

ns

V

RST

Power-up

Reset Voltage

3.8

4.5

V

C

LOCK

POWER

REGISTERED

OUTPUTS