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W91432 Datasheet(PDF) 2 Page - Winbond |
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W91432 Datasheet(HTML) 2 Page - Winbond |
2 / 14 page W91430N SERIES - 2 - PIN CONFIGURATION C1 C2 C3 C4 SS V XT XT 1 2 3 4 5 6 7 8 9 T/P MUTE HKS DTMF MODE R4 R3 R2 R1 VDD DP 12 18 17 16 15 14 10 11 13 C5 PIN DESCRIPTION SYMBOL PIN I/O FUNCTION Column- Row Inputs 1 −5 & 15 −18 I The keyboard inputs may be used with either a standard 5 × 5 keyboard or an inexpensive single contact (Form A) keyborad. Electronic input from a µC can also be used. A valid key in is defined as a single row being connected to a single column. XT, XT 7, 8 I, O A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator. T/P MUTE 9 O The T/P MUTE is a conventional CMOS N-channel open drain output. The output transistor is switched on during dialing sequence and flash break time. Otherwise, it is switched off. MODE 13 I Pulling mode pin to VSS places the dialer in tone mode. Pulling mode pin to VDD places the dialer in pulse mode with M/B ratio 40:60 (20 ppS only for W91433N and 10 ppS for the others, M/B = 40:60). Floating mode pin places the dialer in pulse mode with M/B ratio 33:67 (20 ppS only for W91433N and 10 ppS for the others). |
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Similar Description - W91432 |
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