1.7.1 Electrical Performance (continued)
tI
tL
tGD
tGI
No Signal Call Progress
Single Tone
CPTone
620 Hz
CPTone
620 Hz
CPTone
620 Hz
SIGIN
ENABLE
D0
RP
t
tRP
tDRP
Tri-state
Tri-state
tHIZ
tDE
D1
D2
See Note 1
"0"
D3
"0"
CSN
IRQN
tDI
tDI
tIP
Figure 4 Timing Diagram: Call Progress Tone(s)
tI
tL
tNG
Non Call
Progress Signal
No Signal Non Call
SIGIN
Progress Signal
ENABLE
D0
tNRP
tNDRP
Tri-state
"0"
tDE
D1
D2
See Note 1
"0"
D3
"0"
CSN
IRQN
tDI
tIP
Figure 5 Timing Diagram: Non Call Progress Signal
Note 1: D2 is '1' only when the Call Progress signal, or a Non Call Progress signal, is a single
frequency tone.
ã 1999 Consumer Microcircuits Limited
13
D/663/3
CMLMICRO [ CML MICROCIRCUITS ]
