Rainbow Electronics ATV22V10BQL - Manual (Page 6)

ATF22V10B(Q)(L)
6
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/erasin g is performed u sin g sta ndard
P L D p r o g r a m m e r s. S e e C M OS P L D P r o g r a m m i n g
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
CC
. 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