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HT9302G Datasheet(PDF) 9 Page - Holtek Semiconductor Inc |
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HT9302G Datasheet(HTML) 9 Page - Holtek Semiconductor Inc |
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9 / 33 page  HT9302 Series Rev. 1.30 9 May 13, 2009 LOCK function The function aims to detect locked dialing number to prevent a long distance call. The dialing output of the chip is disabled if the first input key after on-off-hook is the locked number when the lock function is enabled. The lock function selection is listed below. · HT9302x version LOCK Pin Function OPEN Normal dialing (no lock) VDD ²0, 9² is inhibited VSS ²0² is inhibited Key definition · 0,1,2,3,4,5,6,7,8,9 keys These are dialing number input keys for both the pulse mode and the tone mode operations. · */T This key executes the P ®T function and waits a tP®T duration in the pulse mode. On the other hand, the */T key executes the * function in the tone mode. · # This is a dialing signal key for the tone mode only, no response in the pulse mode. · SA Pressing this key can save the preceding dialing tele- phone numbers. The saved number is redialed if it is pressed again. SA will also redial the saved number if it is the first key pressed at the off-hook state. During the dialing signal transmission, the SA key is inhibited. · F The flash key can be selected as a digit or a control key by the option resistors RK13 &RK14. Pressing the flash key will force the PO pin to be ²low² for the tF duration and is then followed by tFP (sec). tF can also be selected by RK13,RK14. · P Pause key. The execution of the pause key pauses the output for the tP duration. tP can be selected by RK21. · R Redial key. Executes redialing as well as one-key re- dial function. · ST This key can store lock number with personal code in IDD lock operation. · R/P Redial and pause function key. If it is pressed as the first key after off-hook, this key executes the redial function. Otherwise, it works as the pause key. |
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