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ATF22LV10CZ Datasheet(PDF) 7 Page - ATMEL Corporation |
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ATF22LV10CZ Datasheet(HTML) 7 Page - ATMEL Corporation |
7 / 19 page 7 0779M–PLD–7/10 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 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 Parameter Description Typ Max Units T PR Power-up Reset Time 600 1000 ns V RST Power-up Reset Voltage 2.3 2.7 V 100K V CC ESD PROTECTION CIRCUIT INPUT |
Similar Part No. - ATF22LV10CZ_14 |
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Similar Description - ATF22LV10CZ_14 |
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