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HT95C40P Datasheet(PDF) 24 Page - Holtek Semiconductor Inc |
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HT95C40P Datasheet(HTML) 24 Page - Holtek Semiconductor Inc |
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24 / 51 page  HT95CXXX Rev. 1.50 24 May 26, 2005 Bit No. Label R/W Function 0 F_PWDN RW FSK decoder power down 1: FSK decoder is at power down mode 0: FSK decoder is at operation mode 1 ¾ RO Unused bit, read as ²0² 2 FMSK RW FSK packet data interrupt mask 1: Disable FSK packet data interrupt 0: Enable FSK packet data interrupt 3 RMSK RW Ring or line reversal detect interrupt mask 1: Disable ring or line reversal detect interrupt 0: Enable ring or line reversal detect interrupt 4 CMSK RW Carrier detect interrupt mask 1: Disable carrier detect interrupt 0: Enable carrier detect interrupt 5 FSKSEL RW Select FSK packet data source 1: FSK packet data source is DOUTC 0: FSK packet data source is DOUT 6, 7 ¾ RO Unused bit, read as ²0² FSKC (29H) Register Bit No. Label R/W Function 0 RDETF RW Ring or line reversal detect interrupt flag 1: Ring or line reversal detected 0: No ring or line reversal detected This flag is set by hardware and cleared by software. 1 CDETF RW FSK carrier detect interrupt flag 1: An FSK carrier signal is detected 0: No valid FSK carrier signal is detected This flag is set by hardware and cleared by software. 2 DOUT RO This flag presents the FSK decoder output when the decoder is at operation mode. This data stream includes the alternate 1 and 0 pattern, the marking and the data. 3 DOUTC RO This flag present the FSK decoder output like as the DOUT flag but does not in- clude the alternate 1 and 0 pattern. 4 ¾ RO Unused bit, read as ²0² 5 FSKF RW FSK packet data interrupt flag 1: FSK packet data is ready 0: FSK packet data is not ready This flag is set by hardware and cleared by software. 6 RINGF RO This flag presents the ring coming signal. Refer to the following figure. 7 ¾ RO Unused bit, read as ²0² FSKS (2AH) Register Bit No. Label R/W Function 7~0 ¾ RO FSK packet data register FSKD (2BH) Register |
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