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SC9257 Datasheet(PDF) 5 Page - Silan Microelectronics Joint-stock |
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SC9257 Datasheet(HTML) 5 Page - Silan Microelectronics Joint-stock |
5 / 28 page Silan Semiconductors SC9257 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD REV: 1.0 2001.10.18 5 PIN DESCRIPTION Pin No. Symbol Pin name Description Circuit diagram 1 XT 2 XT Crystal oscillator pins Connects 3.6MHz, 4.5MHz, 7.2MHz or 10.8MHz crystal oscillator to supply reference frequency and internal clock XT XT VDD 3 PERIOD Period signal input 4 CLOCK Clock signal input 5 DATA Serial data input/output Serial I/O ports. These pins transfer data to and from the controller to set divisions and dividing modes, and to control the general-purpose counter and general-purpose I/O ports. Schmitt input DATA VDD Schmitt input CLOCK,PERIOD 6 OT-1 7 OT-2 8 OT-3 9 OT-4 General-purpose output ports N channel open drain port pins, for such uses as control signal output. These pins are set to the OFF state when power is turned on. N-channel open drain 10 I/O-5/CLK 11 I/O-6 General-purpose I/O ports CMOS structure allows free use of these ports for input or output. Ports are set for input when the power is turned on , I/O-5 can be switched for use as a system clock output pin. VDD 13 AMIN 14 FMIN Programmable counter input These pin input FM and AM band local oscillator signals by capacitor coupling. FMIN and AMIN operate at low amplitude. VDD 16 I/O- 9/IFIN2 17 I/O- 8/IFIN1 General-purpose I/O ports/General- purpose counter frequency measurement input General-purpose I/O port input/output pins. Can be switched for use as input pins to measure general-purpose counter frequencies. The frequency measurement function has such uses as measuring intermediate frequencies (IF). These pins feature built-in amps. Data are input by capacitor coupling. FMIN and AMIN operate at low amplitude. (note) Pins are set for input when power is turned on. VDD (To be continued) |
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