Electrical Performance (continued)
Figure 4 µC Parallel Interface Timings
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, VDD = 3.0V to 5.0V, Tamb = -40°C to +85°C, S/N = 20dB.
Signal Timings (ref. Figures 3, 4 and 5)
tl
Burst Length Ignored
tL
Burst Length Detected
tGI
Call Progress Tone Gap Length
Ignored
tGD
Call Progress Tone Gap Length
Detected
tRP
tDRP
Call Progress Tone Response Time
Call Progress Tone De-Response
Time
Notes Min.
80.0
8
8
40.0
9
9
Typ. Max.
40.0
20.0
80.0
80.0
Units
ms
ms
ms
ms
ms
ms
Notes:
8. Only applies to bursts of the same frequency.
9. Measured with 350+440Hz tone pair.
© 2001 Consumer Microcircuits Limited
11
D/673/5