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EM91210A Datasheet(PDF) 4 Page - ELAN Microelectronics Corp |
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EM91210A Datasheet(HTML) 4 Page - ELAN Microelectronics Corp |
4 / 19 page EM91210 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE 4 * This specification are subject to be changed without notice. 10.1.1997 FUNCTION DESCRIPTIONS Dialing signal selection The EM91210 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. DTMF signal ROW3 ROW4 Tf (ms) COL1 Td (ms) Titp (ms) NR NR 600 R-Vdd 90 90 NR R-Vss 100 NR 98 98 R-Vss NR 80 R-Vss 83 83 R-Vss R-Vss 300 e. Pause time and P-T wait time f. Keyboard operate type COL2 Tp (sec) Tpt (ms) COL3 Type NR 3.6 3.6 NR A R-Vss 2.0 2.0 R-Vss B 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. Redialing: After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The numbers that are stored into LNB memory will be dialed output. SAVE redial memory The SAVE meomry is designed in EM91210 series to support 32 digits capacity buffer for second redial, pager, Memory and other system applications. |
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