© 1999 Consumer Microcircuits Limited

15

D/663/3

1.7.1

Electrical Performance (continued)

CSN

IRQN

D0 to D3

SIGIN

ENABLE

Tri-State

Tri-State

No Signal

Call Progress Signal

Figure 8 Bus Timing

For the following conditions unless otherwise specified:

Parameter

Notes

Min.

Typ.

Max.

Units

Call Progress Tone Response Time

8

-

-

145

ms

Call Progress Tone De-response Time

8

-

-

145

ms

Non Call Progress Signal Response Time

145

-

-

ms

Non Call Progress Signal De-response Time

-

80

-

ms

Burst Length Ignored

8

-

-

70

ms

Burst Length Detected

8

145

-

-

ms

Call Progress Tone Gap Length Ignored

8,9,11

-

-

20

ms

Call Progress Tone Gap Length Detected

8,9

40

-

-

ms

Non Call Progress Signal Gap Length Ignored

10

-

80

-

ms

Data available to Interrupt pulse

-

-

430

µs

"CSN-Low " to Data Valid

-

-

0.2

µs

"CSN-High" to Output Tri-state

-

-

1.0

µs

Interrupt Reset Time

-

-

0.2

µs

Interrupt Low Pulse

4.0

5.0

6.0

µs

Notes:

8.

Timing also applies to Special Information Tones and Fax/modem Tones.

9.

Only applies to burst of the same frequency.

10. If the gap > 90ms, a NO Signal state will be detected.