Electronic Components Datasheet Search |
|
CMX808AP4 Datasheet(PDF) 11 Page - CML Microcircuits |
|
CMX808AP4 Datasheet(HTML) 11 Page - CML Microcircuits |
11 / 23 page Family Radio CTCSS 'Type 2' Encoder and Decoder CMX808A 2003 CML Microsystems Plc 11 D/808A/6 TONE CLONING Register (Hex address $9C) This register enables and disables tone cloning as shown below: $9C = $01 enables tone cloning. $9C = $00 disables tone cloning. Figure 4 shows the tone cloning routine. 8-bit Read Only Registers HEX ADDRESS/ COMMAND REGISTER NAME BIT 7 (D7) BIT 6 (D6) BIT 5 (D5) BIT 4 (D4) BIT 3 (D3) BIT 2 (D2) BIT 1 (D1) BIT 0 (D0) CTCSS RX TONE $81 SUB-AUDIO 0 0 0 0 TONE MSB LSB STATUS DECODE BIT 2 BIT 1 BIT 0 Read Only Register Description SUB-AUDIO STATUS Register (Hex address $81) Reading the SUB-AUDIO STATUS register clears the interrupt (IRQN). This register is used to indicate the status of the device as described below: (Bits 7, 6, 5 and 4) Reserved for future use. These will be set to "0" but should be ignored by user's software. TONE DECODE (Bit 3) This bit indicates the status of the tone decoder. A "1" indicates a tone has been detected (TONE DECODE) and a "0" indicates the loss of the tone (NOTONE). TONE DECODE means that a tone has been decoded and its characteristics are defined by the bandwidth (see SUB-AUDIO CONTROL register $80, Bits 5, 4, 3 and 2) and the CTCSS RX TONE number (see SUB-AUDIO STATUS register $81, Bits 2, 1 and 0). When Bit 6 in the SUB-AUDIO CONTROL register $80 is set to "0" the TONE DECODE Bit 3 will be set to "0". Identification of a valid tone which is not in the pre-programmed list of up to 7 tones will cause the decoder to move to the TONE DECODE state with the RX TONE address of "111" in Bits 2, 1 and 0; indicating a valid but unrecognised tone. Loss of tone will cause the NOTONE timer to be started. If loss of tone continues for the duration of the time-out period, then the decoder will move to NOTONE state and the identification of pre-programmed tones will start again. The time-out period is not user adjustable. CTCSS RX TONE (Bits 2, 1 and 0) These three bits hold a Hex number. Numbers $0 to $6 represent the address of the CTCSS tone decoded according to the tones programmed in the CTCSS RX PROGRAM register $84. The Hex number $7 indicates the presence of any tone that is not described by CTCSS DECODER BANDWIDTH (Bits 5, 4, 3 and 2 in the SUB-AUDIO CONTROL register $80) and CTCSS FREQUENCY (Bits 11 to 0 in the CTCSS RX PROGRAM register $84). |
Similar Part No. - CMX808AP4 |
|
Similar Description - CMX808AP4 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |