CS4922-CL データシートの表示（PDF） - Cirrus Logic
部品番号
コンポーネント説明
メーカー
CS4922-CL Datasheet PDF : 33 Pages
| |||
CS4922
Serial Control Port
REQ - Request Output, PIN 3.
This pin is driven low when the DSP needs servicing from an external device. A write to the
SCPOUT will cause the REQ to go low. A pull-up resistor is required for proper operation
(2.2kΩ is typical).
CS - Chip Select Input, PIN 44.
In SPI format, all communication between the host and the CS4922 is initiated when the host
drives the CS pin low. This pin also serves as the communication format select during a reset
or power up. When CS is high during a reset or power up the SCP will be configured in I2C®
mode. When low, it is configured in SPI mode. The mode is selectable in software by setting
the M0 bit in the SCPCN.
SCK/SCL - Serial Clock Input, PIN 2.
SCK/SCL clocks data into or out of the serial control port. This is always driven by an external
device because the CS4922 always operates in slave mode.
SDA/CDOUT - Serial Data I/O / Control Data Output, PIN 4.
In SPI mode, CDOUT is a data output for the serial control data. In I2C interface mode, SDA
is a bi-directional data I/O. It is required that a pull-up be used (2.2 kΩ is typical in I2C
mode).
CDIN - Control Data Input, PIN 1.
In SPI mode, CDIN is the data input for the serial control port. It has no function in I2C mode.
The pin should be connected to either digital power or ground when the CS4922 is used in I2C
systems.
Auxiliary Digital Audio Port
AUXLR - Auxiliary Sample Clock, PIN 10.
This output signal determines which channel is currently being input on the AUXIN pin or
output on the AUXOUT pin. It is also the sample clock, Fs.
AUXIN - Auxiliary Data Input, PIN 9.
Two’s complement MSB first serial data is input on this pin. The data is clocked by AUXCLK
and the channnel is determined by AUXLR.
AUXOUT - Auxiliary Data Output, PIN 8.
Two’s complement MSB first serial data is output on this pin. The data is clocked by
AUXCLK and the channel is determined by AUXLR.
AUXCLK - Auxiliary Serial Clock Output, PIN 11.
This is the auxiliary audio port serial clock output. This output is used to clock data in on the
AUXIN pin and shift data out on the AUXOUT pin. Its frequency is selectable in software.
30
Share Link: 