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HT9320A Datasheet(PDF) 11 Page - Holtek Semiconductor Inc |
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HT9320A Datasheet(HTML) 11 Page - Holtek Semiconductor Inc |
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11 / 30 page  Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions THD Tone Signal Distortion 2.5V RL=5kW¾ -30 -23 dB TTMIN Minimum Tone Duration ¾ Auto-redial ¾ 82.5 ¾ ms TITPM Minimum Inter-tone Pause ¾ Auto-redial ¾ 85.5 ¾ ms THD (Distortion) (dB) = 20 log ( V1 V2 Vn / Vi Vh 22 2 2 2 ++ + K ) Vi, Vh: Row group and column group signals V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz) HT9320 11 July 21, 1999 Functional Description Keyboard matrix C1~C8 and R1~R5 form a keyboard matrix. To- gether with a standard 5´8 keyboard, the key- board matrix is used for dialing entries. In addition, the keyboard matrix also provides resis- tor options for different dialing specification se- lections. The keyboard arrangement for the HT9320 series are shown in the Keyboard In- formation. Tone frequency Tone Name Output Frequency (Hz) % Error Specified Actual R2 697 699 +0.29% R3 770 766 -0.52% R4 852 847 -0.59% R5 941 948 +0.74% C1 1209 1215 +0.50% C2 1336 1332 -0.30% C3 1477 1472 -0.34% Note:%Errordoesnotcontainthecrystalfrequency drift Dialing specification selection Various dialing specifications can be selected by adding resistors across keyboard matrix pins. The allowable option resistor connections are shown on the table. All the resistors are 330kW. The resistor option functions and the default specifications (with- outoptionresistors)arelistedbelow(HT9320A/ B/C/K/L). Option Resistor Option Function Default (No Resistor) RK12 (HT9320B/ C/K/L) Ratio Selection 40:60 RK13 Flash Function /Time Selection Flash= control function Flash time= 600ms RK14 RK21 Pause & P®T Duration Selection TP= 3.6s TP®T= 3.6s RK31 Pulse Number Selection N RK41 RK51 (HT9320A /B/C/K) Inter-digit- Pause Time for 10pps 800ms R1 R2 R3 R4 K2 1 R C1 C2 C3 C4 C5 C6 C7 K3 1 R K4 1 R K5 1 R K6 1 R K7 1 R K1 2 R K1 3 R K1 4 R |
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Similar Description - HT9320A |
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