1.7.1 Electrical Performance (continued)
No Signal
SIGIN
Call Progress Signal
ENABLE
tRP
tDRP
CSN
IRQN
tIR
tDI
tDI
Tri-State
D0 to D3
Tri-State
tDE
tHIZ
Figure 8 Bus Timing
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, VDD = 3.3V to 5.0V, Tamb = -40°C to +85°C.
Parameter
Notes
Min.
Typ.
Max.
145
145
-
Units
ms
ms
ms
ms
ms
ms
ms
ms
ms
µs
tRP
tDRP
tNRP
tNDRP
tI
Call Progress Tone Response Time
Call Progress Tone De-response Time
Non Call Progress Signal Response Time
Non Call Progress Signal De-response Time
Burst Length Ignored
8
8
-
-
-
-
145
-
80
-
-
-
8
8
-
70
-
tL
Burst Length Detected
145
-
tGI
Call Progress Tone Gap Length Ignored
Call Progress Tone Gap Length Detected
Non Call Progress Signal Gap Length Ignored
Data available to Interrupt pulse
"CSN-Low " to Data Valid
8,9,11
8,9
10
-
40
-
-
20
-
tGD
tNG
tDI
-
80
-
-
-
430
0.2
1.0
0.2
6.0
tDE
tHIZ
tIR
-
-
µs
"CSN-High" to Output Tri-state
Interrupt Reset Time
-
-
µs
-
-
µs
tIP
Interrupt Low Pulse
4.0
5.0
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.
11. Special Information Tones and Fax/modem tones tGI is 15ms maximum.
ã 1999 Consumer Microcircuits Limited
15
D/663/3
CMLMICRO [ CML MICROCIRCUITS ]
