W91031 Datasheet, PDF (26/29 Pages) Winbond – LOW POWER CMOS INTERGRATED CIRCUIT

Preliminary W91031
Line Reversal
A/B Wires
Alert Signal
A
B
C
RNGON
Ch. Seizure Mark
Message
D
E
F
G
Ring
SLEEP
INTN
t
ALGO
REC
TE DC load
< 120 uA
TE AC load
...
...
t
ABS
15 1 mS
< 0.5 mA (optional)
Current wetting pulse (Refer to SIN227)
20 5 mS _{Note 1}
Zss (Refer to SIN227)
Note 4
50 - 150 mS
Note 2
FSKE
Note 3
FCDN
FDRN
DCLK
DATA
...
...101010...
...
Data
A >= 100 mS
B = 88 - 110 mS
C >= 45 mS (up to 5 sec)
D = 80 - 262 mS
E = 45 - 75 mS
F <= 2.5 sec (500 mS typical)
G >= 200 mS
Figure 9-5. Input and Output Timing of BT Idle State (On-hook) Data Transmission
Notes:
1. SIN227 specifies that the AC and DC loads should be applied at 20 ±5 mS after the end of the dual tone alert signal.
2. SIN227 specifies that the AC and DC loads should be removed between 50−150 mS after the end of the FSK signal.
The W91031 may also be placed in a sleep condition.
3. The FSKE pin should be set low to disable the FSK demodulator when FSK is not expected. The tone alerting signal speech
and the DTMF tones are in the same frequency band as the FSK signal.
4. The W91031 may not be woken up at this ring signal after the FSK data has been processed.
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