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W91580 Datasheet(PDF) 2 Page - Winbond |
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W91580 Datasheet(HTML) 2 Page - Winbond |
2 / 19 page W91580 SERIES - 2 - PIN CONFIGURATIONS R2 R1 R4 1 2 3 4 5 18 19 20 21 22 C1 C3 C4 C5 C2 C6 C7 6 7 8 9 14 15 16 17 MODE DTMF 10 11 12 13 XT R3 VDD VSS R5 XT T/P MUTE HKS DP/C9 NC R2 R1 R4 1 2 3 4 5 20 21 22 23 24 C1 C3 C4 C5 C2 C6 C7 6 7 8 9 16 17 18 19 MODE DTMF 10 11 12 13 14 15 XT HFO R3 VDD VSS R5 XT T/P MUTE HFI HKS DP/C9 NC R2 R1 R4 1 2 3 4 5 24 25 26 27 28 C1 C3 C4 C5 C2 C6 C7 6 7 8 9 20 21 22 23 MODE DTMF 10 11 12 17 18 19 XT R3 VDD VSS R5 XT DP/C9 HKS 13 14 15 16 HFO T/P MUTE HFI C8 KT DRS HPM MUTE NC W91580 W91580A W91580B/C PIN DESCRIPTION SYMBOL 22-PIN 24-PIN 28-PIN I/O FUNCTION Column- Row Inputs 1 −7 & 18 −22 1 −7 & 20 −24 1 −8 & 24 −28 I The keyboard input may be used with either the standard 9 × 5 keyboard or an inexpensive single contact (form A) keyboard. Electronic input from a µC can also be used. A valid key entry is defined by a single row being connected to a single column. XT, XT 9, 10 9, 10 11, 12 I, O A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator. T/P MUTE 11 11 13 O The T/P MUTE is a conventional CMOS N-channel open drain output. The output transistor is switched on during pulse and tone mode dialing sequence and flash break. Otherwise, it is switched off. HPM MUTE - - 23 O The HPM MUTE is a conventional inverter output. During pulse dialing, flash, hold, and mercury mute functions, this pin will output an active high. It remains in a low state at all other times. |
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