Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
CDB4216 Datasheet(PDF) 11 Page - Cirrus Logic |
|
CDB4216 Datasheet(HTML) 11 Page - Cirrus Logic |
11 / 58 page Alternatively, soft power down may be initiated, in slave mode, by reducing the SCLK frequency below the minimum CLKIN/12. In soft power down the analog outputs are muted and the serial data from the codec will indicate invalid data and the appropriate error code. The parallel bit I/O is still functional in soft power down mode. This is, in effect, a low power mode with only the parallel bit I/O unit functioning. Audio Serial Interface In serial modes 1, 2, and 3, the audio serial port uses 4 pins: SDOUT, SDIN, SCLK and SSYNC. SDIN carries the D/A converters’ input data and control bits. Input data is ignored for frames not allocated to the selected CS4216. SDOUT car- ries the A/D converters’ output data and status bits. SDOUT goes to a high-impedance state during frames not allocated to the selected CS4216. SCLK clocks data in to and out of the CS4216. The rising edge of SCLK clocks data out on SDOUT. The falling edge latches data on SDIN into the port (SCLK polarity is inverted in Serial Modes 1&2). SSYNC indicates the start of a frame and/or sub-frame. SCLK and SSYNC must be synchronous to the master clock. Serial mode 4 is similar to serial mode 3 with the exception of the control information. In serial mode 4 the control information is entered through a separate asynchronous control port. Therefore, the audio serial port only contains audio data which reduces the number of bits on the audio port from 64 to 32 per codec. The serial port protocol is based on frames con- sisting of 1, 2, or 4 sub-frames. The frame rate is the system sample rate. Each sub-frame is used by one CS4216 device. Up to 4 CS4216s may be attached to the same serial control lines. SFS1 and SFS2 are tied low or high to indicate to each CS4216 which sub-frame is allocated for it to use. Serial Data Format In serial modes 1, 2, and 3, a sub-frame is 64 bits in length and consists of two 16-bit audio values and two 16-bit control fields. In serial mode 4 a sub-frame is 32 bits in length and only contains the two 16-bit audio values; the control data is loaded through a separate port. The audio data is MSB first, 2’s complement format. The sub-frame bit assignments for serial modes 1, 2, and 3, are numbered 1 through 64 and are shown in Figures 5 and 6. Control data bits all reset to zero. CS4216 SERIAL INTERFACE MODES The CS4216 has 4 serial port modes, selected by the SMODE1, SMODE2 and SMODE3 pins. In all modes, CLKIN, SCLK and SSYNC must be derived from the same clock source. SM1 is an easy interface to ASICs that use a change in the SCLK-to-CLKIN ratio to determine the sample SMODE PINS Serial SCLK Bit Sub-frame Bits per SCLK & Master 3 2 1 Mode Center Width Frame (BPF) SSYNC Frequency 0 0 0 SM1 Rising 64 bits 256 Slave CLKIN = 512 ×Fs 0 0 1 SM2 Rising 64 bits 256 Slave SCLK = 256 ×Fs 0 1 0 SM3 Falling 64 bits 64/128/256 Master/Slave CLKIN/SCLK = 256 ×Fs 011 Factory Test mode 1 x x SM4 Falling 32 bits † 32/64/128 † Master/Slave CLKIN = 256 ×Fs †Contains audio data only. Control information is entered through a separate serial port. Table 1. Serial Port Modes CS4216 DS83F2 11 |
Número de pieza similar - CDB4216 |
|
Descripción similar - CDB4216 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes 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 |