Rainbow-electronics ATV22V10BQL Manuel d'utilisateur télécharger pdf (Page 6)

ATF22V10B(Q)(L)

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.

Programming/Erasing

Programming/erasing is performed using standard

PLD programmers. See CMOS PLD Programming

Hardware and Software Support for information on

software/programming.

Input and I/O Pull-ups

All ATF22V10B family members have internal input and I/O

pull-up resistors. Therefore, whenever inputs or I/Os are

not being driven externally, they will float to V

. This

ensures that all logic array inputs are at known states.

These are relatively weak active pull-ups that can easily be

overdriven by TTL-compatible drivers (see input and I/O

diagrams below).

Input Diagram I/O Diagram

1 2 3 4 5 6 7 8 9 10 11 ... 15 16

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Rainbow-electronics ATV22V10BQL Manuel d'utilisateur Page 6