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FM209 Fiches technique(PDF) 6 Page - List of Unclassifed Manufacturers |
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FM209 Fiches technique(HTML) 6 Page - List of Unclassifed Manufacturers |
6 / 12 page 6 MD205 Table 3. Turn-On Sequence Times ≤ ≤ Table 4. Turn-Off Sequence Times ! Notes: 1. In parallel data mode, the turn-off sequence may be extended by 8 bit times. 2. In HDLC mode, the turn-off sequence may be extended by more than 8 bit times. Caller ID Reception Caller ID reception (CID) allows Customer Premises Equipment (CPE) to receive a calling party’s directory number which includes the date and time of the call. For Type I Caller ID this information is contained in the first 4-second silent interval in the ring cycle. For Type II Caller ID support an ACK signal is sent by the CPE in response to a CAS tone, after which the calling party information from the Stored Program Control Switching System (SPCS) can be received by the CPE. Tone Generation The modem can generate voice-band single or dual tones from 0 Hz to 4800 Hz with a resolution of 0.15 Hz and an accuracy of 0.01%. Tones over 3000 Hz are attenuated. Dual tone generation allows the modem to operate as a programmable DTMF dialer. Tone Detectors All three tone detectors operate in all receive modes. The tone detectors can also operate as one 12th order filter. The filter coefficients of each filter are host programmable in RAM. The output of the tone detector filter goes to an energy detector. Hardware Interface The Fax, Digital Telephone Answering Machine (DTAM), and Speakerphone hardware interface signals are shown in Figure 1, Figure 2, and Figure 3. Any point that is active when exhibiting the relatively more negative voltage of a two-voltage system (0 VDC for TTL or -12 VDC for EIA/TIA-232-E) is called active low and is represented by a small circle at the signal point. Active low signals are indicated by a pound sign (#), (RESET#). Edge-triggered clocks are indicated by a small triangle (DCLK). A small half circle denotes open-collector (open- source or open-drain) outputs (signal IRQ#). A clock intended to activate logic on its rising edge (low-to-high transition) is called active high, while a clock intended to activate logic on its falling edge (high-to-low transition) is called active low. When clock input is associated with a small circle, the input activates on a falling edge. If no circle is shown, the input activates on a rising edge. The pin assignments for the 128-pin TQFP are shown in Figure 4. General Specifications The modem power and environmental requirements are listed in Table 5 and Table 6, respectively. Table 5. Current and Power Requirements Mode Option Current (Typ.) @25 °C 3.3V ± 5%. DVAA 2.5 ma V DD Basic 50 ma V DD - V 72 ma V DD - VS 80 ma 5V ± 5% V GG 5.5 ma Basic .25 ma - V .30 ma - VS .30 ma Note: Input Ripple ≤0.1 Vpeak-peak. The amplitude of any frequency between 20 kHz and 150 kHz must be less than 500 µVpeak. Table 6. Environmental Requirements Parameter Specification Temperature Operating 0 °C to +70°C (32°F to 158°F) Storage -55 °C to +125°C (-67°F to 257°F) Relative Humidity Up to 90% non-condensing, or a wet bulb temperature up to 35 °C, whichever is less. |
Numéro de pièce similaire - FM209 |
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Description similaire - FM209 |
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