u3762mb ETC-unknow, u3762mb Datasheet - Page 15

• Manufacturer Part Number: u3762mb
• Description: Universal Telephone Functions Integrated
• Manufacturer: ETC-unknow

Rev. A1, 15-Sep-98
Flash (F)
1.
2.
3.
t
t
t
t
t
KID
KRD
PDP
IDP
TD
OFF HOOK
KEY IN
The dialer will execute flash break and the entire flash pause time will elapse before the next digits are dialed out.
The flash key can be stored as a digit in the memory. Only one flash, however, will be released to the users.
The system will return to the initial state after the flash pause time has elapsed.
MASK
MUTE
KEY IN
EARTH
= key active in debounce
= key release debounce
= pre-digit pause
= inter-digit pause
= DTMF output duration
MASK
MFO
MUTE
HKS
OSC
DP
DP
,
F
t
KID
F
n
Low
Figure 11. Symbolic timing diagram: Earth function
Preliminary Information
t
FP
F
Figure 10. Flash operation
Oscillation
High
t
FB
t
t
t
t
ITP
FB
FP
P
t
FP
3
= intertone pause
= flash break time
= flash pause time
= pause time
t
ITP
U3762MB
15028
15027
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