CDB4265 Cirrus Logic Inc, CDB4265 Datasheet - Page 52

• Manufacturer Part Number: CDB4265
• Description: BOARD EVAL FOR CS4265 CODEC
• Manufacturer: Cirrus Logic Inc

Specifications of CDB4265

• Main Purpose: Audio, CODEC
• Embedded: No
• Utilized Ic / Part: CS4265
• Primary Attributes: Stereo, 24-Bit, 192 kHz Sample Rate
• Secondary Attributes: Graphic User Interface, S/PDIF/ I2S / I2C / SPI Interface
• Description/function: Audio CODECs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS4265
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1001

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11.CHANNEL STATUS BUFFER MANAGEMENT
The CS4265 has a comprehensive channel status (C) data buffering scheme which allows the user to manage the
C data through the control port.
11.1
IEC60958-3 Channel Status (C) Bit Management
The CS4265 contains sufficient RAM to store a full block of C data for both A and B channels (192x2 = 384
bits). The user may read from, or write to, these RAM buffers through the control port.
The CS4265 manages the flow of channel status data at the block level, meaning that entire blocks of chan-
nel status information are buffered at the input, synchronized to the output time base, and then transmitted.
The buffering scheme involves a cascade of two block-sized buffers, named E and F, as shown in
The MSB of each byte represents the first bit in the serial C data stream. For example, the MSB of byte 0
(which is at control port address 13h) is the consumer/professional bit for channel status block A.
The E buffer is accessible from the control port, allowing read and writing of the C data. The F buffer is used
as the source of C data for the IEC60958-3 transmitter. The F buffer accepts block transfers from the E buff-
er.
Figure 44. Channel Status Data Buffer Structure
8-bits
A
C ontrol Port
w ords
E
8-bits
24
B
Transm it
D ata
Buffer
F
To
AE S3
Transm itter
CS4265
Figure
DS657F2
44.