 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SAA7327 Datasheet(PDF) 32 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
SAA7327 Datasheet(HTML) 32 Page - NXP Semiconductors |
|
|
32 / 68 page  1999 Jun 17 32 Philips Semiconductors Product specification Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II) SAA7327 During reset (i.e. RESET pin is held LOW) the RA, FO and SL pins are high-impedance. 7.14.10 LASER INTERFACE The LDON pin (open-drain output) is used to switch the laser off and on. When the laser is on, the output is high-impedance. The action of the LDON pin is controlled by the xtra_preset parameter; the pin is automatically driven if the focus control loop is active. 7.14.11 RADIAL SHOCK DETECTOR The shock detector (see Fig.22) can be switched on during normal track following, and detects within an adjustable frequency whether disturbances in the radial spot position relative to the track exceed an adjustable level (controlled by shock_level). Every time the radial tracking error exceeds this level the radial control bandwidth is switched to twice its original bandwidth and the loop gain is increased by a factor of 4. The shock detection level is adjustable in 16 steps from 0% to 100% of the traverse radial amplitude which is sent to an amplitude detection unit via an adjustable band-pass filter (controlled by sledge_parm1); lower corner frequency can be set at either 0 or 20 Hz, and upper corner frequency at 750 or 1850 Hz. The shock detector is switched off automatically during jump mode. Fig.22 Block diagram of radial shock detector. handbook, full pagewidth RE MGC914 SHOCK OUTPUT HIGH-PASS FILTER (0 or 20 Hz) LOW-PASS FILTER (750 or 1850 Hz) AMPLITUDE DETECTION 7.15 Microcontroller interface Communication on the microcontroller interface can be set-up in two different modes: • 4-wire bus mode: protocol compatible with SAA7345 (CD6) and TDA1301 (DSIC2) where: – SCL = serial clock – SDA = serial data – RAB=R/W control and data strobe (active HIGH) for writing to decoder registers 0 to F, reading status bit selected via decoder register 2 and reading Q-channel subcode – SILD = R/W control and data strobe (active LOW) for servo commands. • I2C-bus mode: I2C-bus protocol where SAA7327 behaves as slave device, activated by setting RAB = HIGH and SILD = LOW where: –I2C-bus slave address (write mode) = 30H –I2C-bus slave address (read mode) = 31H – Maximum data transfer rate = 400 kbits/s. It should be noted that only servo commands can be used therefore, writing to decoder registers 0 to F, reading decoder status and reading Q-channel subcode data must be performed by servo commands. |
Similar Part No. - SAA7327 |
|
Similar Description - SAA7327 |
|
|
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
