參數(shù)資料
型號(hào)： CDB42448
廠商： Cirrus Logic, Inc.
元件分類： Codec
英文描述： 108 dB, 192 kHz 6-in, 8-out CODEC
中文描述： 108分貝192千赫6 - 8 -出編解碼器
文件頁(yè)數(shù)： 38/70頁(yè)
文件大?。?/td> 1146K
代理商： CDB42448
38
DS648PP2
4.7
The control port is used to access the registers allowing the CS42448 to be configured for the desired
operational modes and formats. The operation of the control port may be completely asynchronous with
respect to the audio sample rates. However, to avoid potential interference problems, the control port pins
should remain static if no operation is required.
The control port has 2 modes: SPI and I2C, with the CS42448 acting as a slave device. SPI mode is se-
lected if there is a high to low transition on the AD0/CS pin, after the RST pin has been brought high. I2C
mode is selected by connecting the AD0/CS pin through a resistor to VLC or DGND, thereby permanently
selecting the desired AD0 bit address state.
Control Port Description and Timing
4.7.1
In SPI mode, CS is the CS42448 chip select signal, CCLK is the control port bit clock (input into
the CS42448 from the microcontroller), CDIN is the input data line from the microcontroller, CD-
OUT is the output data line to the microcontroller. Data is clocked in on the rising edge of CCLK
and out on the falling edge.
Figure 23 shows the operation of the control port in SPI mode. To write to a register, bring CS
low. The first seven bits on CDIN form the chip address and must be 1001111. The eighth bit is
a read/write indicator (R/W), which should be low to write. The next eight bits form the Memory
Address Pointer (MAP), which is set to the address of the register that is to be updated. The next
eight bits are the data which will be placed into the register designated by the MAP. During
writes, the CDOUT output stays in the Hi-Z state. It may be externally pulled high or low with a
47 k
resistor, if desired.
There is a MAP auto increment capability, enabled by the INCR bit in the MAP register. If INCR
is a zero, the MAP will stay constant for successive read or writes. If INCR is set to a 1, the MAP
will autoincrement after each byte is read or written, allowing block reads or writes of successive
registers.
To read a register, the MAP has to be set to the correct address by executing a partial write cycle
which finishes (CS high) immediately after the MAP byte. The MAP auto increment bit (INCR)
may be set or not, as desired. To begin a read, bring CS low, send out the chip address and set
the read/write bit (R/W) high. The next falling edge of CCLK will clock out the MSB of the ad-
SPI Mode
M AP
MSB
LSB
DATA
byte 1
byte n
R/W
R/W
AD DR ESS
CH IP
ADDRESS
1001111
C H IP
C DIN
C C LK
CS
CD OU T
MSB
LSB MSB
LSB
1001111
MAP = Memory Address Pointer, 8 bits, MSB first
High Impedance
Figure 23. Control Port Timing in SPI Mode
相關(guān)PDF資料
PDF描述
CDB4245 105 dB, 24-Bit, 192 kHz Streo Sudio CODEC
CDB42518 110 dB, 192 kHz 6-Ch Codec with S/PDIF Receiver
CDB42528 114 dB, 192 kHz 6-Ch Codec with S/PDIF Receiver
CDB4270 24-Bit, 192 kHz Stereo Audio CODEC
CDB4271 24-Bit, 192 kHz Stereo Audio CODEC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4245 功能描述:音頻 IC 開發(fā)工具 Eval Bd 192kHz CODEC w/PGA & Input Mux RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42518 功能描述:音頻 IC 開發(fā)工具 Eval Bd RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42528 功能描述:音頻 IC 開發(fā)工具 Eval Bd RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4265 功能描述:音頻 IC 開發(fā)工具 Eval Bd 192kHz CODEC w/PGA & Input Mux RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4270 功能描述:音頻 IC 開發(fā)工具 Eval Bd 105dB 192kHz CODEC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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