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EM91450A Datasheet(PDF) 5 Page - ELAN Microelectronics Corp |
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EM91450A Datasheet(HTML) 5 Page - ELAN Microelectronics Corp |
5 / 24 page EM91450 SERIES TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION 5 * This specification are subject to be changed without notice. 2.10.1999 FUNCTION DESCRIPTIONS Dialing signal selection The EM91450 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described as following : a. Mode b. M/B ratio ROW1 Mode ROW2 MBR (%) R-Vdd 20 PPS NR 40:60 NR Tone R-Vss 33:66 R-Vss 10 PPS c. Flash time d. Lock control method ROW3 ROW4 Tf (ms) COL1 Control method NR NR 600 R-Vdd key lock NR R-Vss 100 NR none lock R-Vss NR 80 R-Vss password lock R-Vss R-Vss 300 e. Lock number COL2 COL3 Lock number NR NR none NR R-Vss 0 R-Vss NR 9 R-Vss R-Vss 0,9 Normal dialing Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory automatically. Operating procedure described as follow : • To select Pulse or Tone mode. • Off-hook or turn on HF function. • Keying d1, d2, .. , dn. The "d" expressed digital keypad that included 1~9, *, 0, #, P, and P →T keys. The "n" expressed unlimited. • The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection. LNB redial memory Storing: In normal dialing mode, every digital key was entry which number will be stored in LNB memory automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled. Otherwise, these numbers stored in LNB memory can be redial output. |
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