5962-89841153A View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

5962-89841153A

High Performance E2 PLD

Atmel Corporation 

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

1,000

ns

3.8

4.5

V

8. Input and I/O Pin-keeper Circuits

The ATF22V10C contains internal input and I/O pin-keeper circuits. These circuits allow each

ATF22V10C pin to hold its previous value even when it is not being driven by an external source

or by the device’s output buffer. This helps to ensure that all logic array inputs are at known valid

logic levels. This reduces system power by preventing pins from floating to indeterminate levels.

By using pin-keeper circuits rather than pull-up resistors, there is no DC current required to hold

the pins in either logic state (high or low).

These pin-keeper circuits are implemented as weak feedback inverters, as shown in the Input

Diagram below. These keeper circuits can easily be overdriven by standard TTL- or CMOS-com-

patible drivers. The typical overdrive current required is 40 µA.

Figure 8-1. Input Diagram

8 ATF22V10C(Q)

0735T–PLD–5/09

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