Rainbow-electronics ATV2500BQL Manual de usuario descargar pdf (Pagina 11)

ATV2500B(Q)(L)

Power-up Reset

The registers in the ATV2500Bs are designed to reset dur-

ing power-up. At a point delayed slightly from V

crossing

RST

, all registers will be reset to the low state. The output

state will depend on the polarity of the output buffer.

This feature is critical for state as nature of reset and the

uncertainty of how V

actually rises in the system, the fol-

lowing conditions are required:

1. The V

rise must be monotonic,

2. After reset occurs, all input and feedback setup

times must be met before driving the clock pin or

terms high, and

3. The clock pin, and any signals from which clock

terms are derived, must remain stable during t

Level Forced on

Odd I/O Pin

during

PRELOAD Cycle

Q Select Pin

State Even/Odd Select

Even Q1 State

after Cycle

Even Q2 State

after Cycle

Odd Q1 State

after Cycle

Odd Q2 State

after Cycle

Low Low High/Low X X X

High Low X High/Low X X

Low High X X High/Low X

High High X X X High/Low

Parameter Description Typ Max Units

Power-up Reset Time 600 1000 ns

RST

Power-up Reset Voltage 3.8 4.5 V

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 20 21

Sin comentarios

Rainbow-electronics ATV2500BQL Manual de usuario Pagina 11