 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MC92314 Datasheet(PDF) 63 Page - Motorola, Inc |
|
||||||||||||||||||||||||||||||
MC92314 Datasheet(HTML) 63 Page - Motorola, Inc |
|
|
63 / 100 page  DVB-T Demodulator Interfaces Single Chip DVB-T Demodulator - Rev. 1.3 (11/30/98) MOTOROLA 4-15 used to set the analog voltage level at the AGC input of the tuner. The format is identical to the AGC Feedback register described below (12 bit width, 4 MSBs of register 1 are always 0). The following table summarises the voltage levels after the LPF in relation to the AGCS bit: 4.2.2.1.14 AFC Feedback [1:0] ($30:$2F, R) These two registers represent the current offset of the internal AFC block inside the available range (register 0 at address $2F corresponds to the LS byte, register 1 at address $30 to the MS byte). Values within the available range excluding the edges represent normal operation. 4.2.2.1.15 AGC Feedback [1:0] Register ($34:$33, R) Similar to the AFC Feedback register these two registers represent the current position of the AGC control inside the available range (register 0 at address $33 corresponds to the LS byte, register 1 at address $34 to the MS byte). The number format is 2’s complement and the number contains 12 valid bits (the 4 MSBs of register 1 are not used, they are always 0). The AGC voltage levels corresponding to the numbers depend from the value of the AGC Slope bit AGCS: Note that for correct operation bit AGCS must reflect the behaviour of the tuner’s AGC circuitry. Given that this setting is correct and the OFDM block is locked onto the signal the most negative value corresponds to the minimum gain of the tuner and the most positive value corresponds to the maximum gain. 4.2.2.1.16 VCXO Fix [1:0] Register ($37:$36, W) This 2-byte register can be used to set the voltage at the σδ-output for the VCXO in the tuner, mainly intended for test purposes, not for normal operation. To use them the FTSE bit must be set to 0. Afterwards the VCXO Fix register can be used to set the analog voltage level at the VCXO input of the tuner. Again, the 4 MSBs of register 1 are always 0. Table 4-6. Voltages after the AGC LPF using the AGC Fix Register AGC Fix Register Content AGCS Voltage Level -2048 (00001000 00000000) 0 Lowest voltage (near 0 V) +2047 (00000111 11111111) 0 Highest Voltage (near 3 V) -2048 (00001000 00000000) 1 Highest Voltage (near 3 V) +2047 (00000111 11111111) 1 Lowest voltage (near 0 V) Table 4-7. Voltages according to the AGC Feedback Registers AGC Feedback Register Content AGCS Voltage Level -2048 (00001000 00000000) 0 Lowest voltage (near 0 V) +2047 (00000111 11111111) 0 Highest Voltage (near 3 V) -2048 (00001000 00000000) 1 Highest Voltage (near 3 V) +2047 (00000111 11111111) 1 Lowest voltage (near 0 V) Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
Similar Part No. - MC92314 |
|
Similar Description - MC92314 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
