Rainbow-electronics ATV2500BQL Bedienungsanleitung PDF herunterladen (Seite 10)

ATV2500B(Q)(L)

Input Test Waveforms and

Measurement Levels

Output Test Load

Preload and Observability of Registered Outputs

The ATV2500Bs registers are provided with circuitry to

allow loading of each register asynchronously with either a

high or a low. This feature will simplify testing since any

state can be forced into the registers to control test

sequencing. A V

level on the odd I/O pins will force the

appropriate register high; a V

will force it low, independent

of the polarity or other configuration bit settings.

The PRELOAD state is entered by placing an 10.25V to

10.75V signal on SMP lead 42. When the preload clock

SMP lead 23 is pulsed high, the data on the I/O pins is

placed into the 12 registers chosen by the Q select and

even/odd select pins.

10.25V to 10.75V signal on pin/lead 2. In this mode, the

contents of the buried register bank will appear on the

associated outputs when the OE control signals are active.

AC Characteristics

Symbol Parameter

-12 -15 -20 -25 -30

Units

Min Max Min Max Min Max Min Max Min Max

PD1

Input to Non-registered Output 12 15 20 25 30 ns

PD2

Feedback to Non-registered

Output

12 15 20 25 30 ns

PD3

Input to Non-registered Feedback 8 11 15 18 20 ns

PD4

Feedback to Non-registered

Feedback

811151820ns

EA1

Input to Output Enable 12 15 20 25 30 ns

ER1

Input to Output Disable 12 15 20 25 30 ns

EA2

Feedback to Output Enable 12 15 20 25 30 ns

ER2

Feedback to Output Disable 12 15 20 25 30 ns

Asynchronous Reset Width 6 8 12 15 18 ns

Asynchronous Reset to

Registered Output

15 18 22 28 30 ns

APF

Asynchronous Reset to

Registered Feedback

12 15 19 25 30 ns

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 20 21

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