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HT9480 Datasheet(PDF) 26 Page - Holtek Semiconductor Inc |
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HT9480 Datasheet(HTML) 26 Page - Holtek Semiconductor Inc |
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26 / 47 page  HT9480 Rev. 1.20 26 July 31, 2002 Address Bit Definition Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 40H ENA A00 A01 A02 A03 A04 A05 A06 41H A07 A08 A09 A10 A11 A12 A13 A14 42H A15 A16 A17 FA2 FA1 FA0 43H ENB B00 B01 B02 B03 B04 B05 B06 44H B07 B08 B09 B10 B11 B12 B13 B14 45H B15 B16 B17 FB2 FB1 FB0 46H ENC C00 C01 C02 C03 C04 C05 C06 47H C07 C08 C09 C10 C11 C12 C13 C14 48H C15 C16 C17 FC2 FC1 FC0 49H END D00 D01 D02 D03 D04 D05 D06 4AH D07 D08 D09 D10 D11 D12 D13 D14 4BH D15 D16 D17 FD2 FD1 FD0 4CH ENE E00 E01 E02 E03 E04 E05 E05 4DH E07 E08 E09 E10 E11 E12 E13 E14 4EH E15 E16 E17 FE2 FE1 FE0 4FH ENF F00 F01 F02 F03 F04 F05 F05 50H F07 F08 F09 F10 F11 F12 F13 F14 51H F15 F16 F17 FF2 FF1 FF0 52H SPF00 SPF01 SPF02 SPF03 SPF04 SPF05 SPF06 SPF07 53H SPF08 SPF09 SPF10 SPF11 SPF12 SPF13 SPF14 SPF15 54H SPF16 SPF17 SPF18 SPF19 SPF20 SPF21 SPF22 SPF23 User address format A user address in the POCSAG code consists of 21 bits. Three of the 21 bits are coded in the frame number and are therefore not explicitly transmitted. In the decoder, the addresses A, B, C, D, E and F can use 6 different frames respectively. Every address has to be explicitly enabled by resetting the associated enable bit. Examples: Address decimal value: RICA=10535 Binary equivalent(14 bits): 10100100100111 Binary equivalent(18+3 bits): 000000010100100100111 Register allocation: A00 A01 A02 A03 A04 A05 A06 A07 A08 000000010 A09 A10 A11 A12 A13 A14 A15 A16 A17 100100100 FR12 FR11 FR10 11 1 Configuration The program mode changes to the STANDBY state by setting the ON bit high at any time. The configuration RAM can be programmed only when the value of the STB flag is 1. After the configuration RAM is pro- grammed and the ON bit is set low, the system quits the program mode and resumes normal operation. Test mode The test mode of the decoder is selected by setting the TS pin low at any time. In the test mode, the RF control outputs BS1 and BS3 are set high constantly, but BS2 is set low. After the TS pin is set high the decoder exits the test mode. |
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