ATF22LV10CQZ-30SI_05 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATF22LV10CQZ-30SI_05

High-performance EE PLD

Atmel Corporation 

ATF22LV10C(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 ATF22LV10CZ/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.

Table 7-1.

Parameter

TPR

VRST

Programming/Erasing

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. 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).

Figure 8-1. Input Diagram

VCC

INPUT

100K

ESD

PROTECTION

CIRCUIT

7

0779L–PLD–12/05

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