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PCD3332-3T Datasheet(PDF) 10 Page - NXP Semiconductors |
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PCD3332-3T Datasheet(HTML) 10 Page - NXP Semiconductors |
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10 / 32 page  1997 Jan 13 10 Philips Semiconductors Product specification Multistandard pulse/tone repertory diallers/ringers PCD3332-2; PCD3332-3; PCD3332-S 5.1.13 RINGER VOLUME SETTINGS Fig.4 FSM for volume control (PCD3332-2). handbook, halfpage DEFAULT VOLUME HIGH VOLUME LOW VOLUME VOL +/# VOL +/# VOL +/# VOL +/# VOL −/* VOL −/* VOL −/* VOL −/* LOWEST VOLUME MGC616 Fig.5 FSM for volume control (PCD3332-3/S). handbook, halfpage DEFAULT VOLUME HIGH VOLUME LOW VOLUME VOL + VOL + VOL + VOL + VOL − VOL − VOL − VOL − LOWEST VOLUME MGC615 Table 5 State assignment 5.1.14 DIAL MODE OUTPUT /KEY-TONE ENABLE (DMO/KTE) In the PULSE dialling mode the DMO/KTE output is activated (HIGH), at dialling the Make/Brake pulse dial sequences. Figures 11 and 12 illustrate the signal timing relationship. In the programming mode, the DMO/KTE output is activated at the same time the key beeps are generated at output TONE and may be used to enable the key tone to the earpiece amplifier. 5.1.15 KEYBOARD INPUTS/OUTPUTS A single contact keyboard with a maximum of 6 columns and 5 rows can be connected to the PCD3332-2. The keyboard scanning is started if a key depression is detected. The rows are scanned while the columns are used as sense inputs. To overcome key bouncing, a debounce on/off time of approximately 14 to 20 ms is implemented. Only one single key depression is validated and accepted at any one time. Once a key is accepted the keyboard scanning is continued until no further keys are depressed. This means that if a key is accepted but still depressed while a second key is entered, the second key depression is ignored. Also, if two or more keys are depressed within the debounce time while no key is yet accepted, all keys are ignored. Keyboard detection is also performed in the ringer mode to enable the ringer volume setting and ringer melody selection. In the on-hook mode or power-down mode of the PCD3332-2 and PCD3332-S, the keyboard I/Os are set to HIGH except ROW 5 which is set to LOW. STATE VOL2 VOL1 Default volume setting HIGH HIGH High volume setting HIGH LOW Low volume setting LOW HIGH Lowest volume setting LOW LOW |
Similar Part No. - PCD3332-3T |
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Similar Description - PCD3332-3T |
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