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SC91316 Datasheet(PDF) 5 Page - Silan Microelectronics Joint-stock |
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SC91316 Datasheet(HTML) 5 Page - Silan Microelectronics Joint-stock |
5 / 14 page Silan Semiconductors SC91310 Series HANGZHOU SILAN MICROELECTRONICS CO.,LTD. Rev: 2.1 2002.12.03 5 PIN DESCRIPTION Pin No. Pin Name I/O Description 1~4 & 15~18 Column- Row Inputs I The keyboard input may be from either the standard 4x4 keyboard or an inexpensive single contact (form A) keyboard. Electronic input from a µC can also be used. A valid key entry is defined as a single row being connected to a single column. 7,8 XT, XT I,O A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator. 9 T/P MUTE 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. 13 MODE I Pulling mode pin to Vss places the dialer in tone mode. Pulling mode pin to VDD places the dialer in pulse mode (10 pps). Leaving mode pin floating places the dialer in pulse mode (20 pps). 10 HKS O Hook switch input. HKS = 1: On-hook state. Chip in sleeping mode, no operation. HKS = 0: Off-hook state. Chip enabled for normal operation. The HKS pin is pulled to VDD by an internal resistor. 11 DP O N-channel drain dialing pulse output (Figure 1). Flash key will cause DP to go active in both pulse mode and tone mode. In pulse mode, remains in low state at all times. In tone mode, outputs a dual or single tone. Detailed timing diagram for tone mode is shown in Figure 2(a, b). Output Frequency(Hz) Specified Actual Error % R1 697 699 +0.28 R2 770 766 -0.52 R3 852 848 -0.47 R4 941 948 +0.74 C1 1209 1216 +0.57 C2 1336 1332 -0.30 12 DTMF O C3 1477 1472 -0.34 14,6 VDD, Vss I Power input pins. 5 B/M I The break make ratio is 60:40 if /M = 1 and is 66.6:33.3 if B/M = 0. This pin has no function in DTMF mode. |
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