Rainbow-electronics ATV750BL Manual de usuario descargar pdf (Pagina 9)

ATV750B(L)

0301I–08/01

Preload of

Registered

Outputs

The ATV750B(L) registers are provided with circuitry to allow loading of each register asyn-

chronously 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 I/O pin will force the reg-

ister high; a V

will force it low, independent of the output polarity. The PRELOAD state is

entered by placing a 10.25V to 10.75V signal on pin 8 on DIPs, and lead 10 on SMDs. When

the clock term is pulsed high, the data on the I/O pins is placed into the register chosen by the

Select Pin.

Level Forced on Registered

Output Pin during

PRELOAD Cycle

Select Pin

State

Cycle

Low High X

Low Low X

High X High

High X Low

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 18 19

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Rainbow-electronics ATV750BL Manual de usuario Pagina 9