ATF22LV10CQZ-30JU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATF22LV10CQZ-30JU

High-performance Electrically Erasable Programmable Logic Device

Atmel Corporation 

Atmel ATF22LV10C(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

A single fuse is provided to prevent unauthorized copying of the Atmel® ATF22LV10CZ/CQZ fuse patterns. 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 Programming

Hardware and Software Support for information on software/ programming.

Table 7-1. Programming/Erasing

Parameter

TPR

VRST

Description

Power-up

Reset Time

Power-up

Reset Voltage

Typ

Max

Units

600

1000

ns

2.3

2.7

V

8. Input and I/O Pin Keepers

All ATF22LV10CZ/CQZ family members have internal input and I/O pin-keeper circuits. Therefore, 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).

Figure 8-1. Input Diagram

VCC

INPUT

100K

ESD

PROTECTION

CIRCUIT

7

0779M–PLD–7/10

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