CS4218 Datasheet, PDF (33/44 Pages) Cirrus Logic – 16-Bit Stereo Audio Codec

CS4218
MF4:CCS - Control Data Chip Select in SM4, PIN 36(L), 30(Q).
In SM4 this pin is the control port chip select signal. When low, the control port data is clocked
in CDIN and status data is output on CDOUT. When CCS goes high, control data is latched
internally. This data remains active until new data is clocked in. The control port may also be
asynchronous to the audio data port.
MF5:DO2 - Parallel Digital Bit Output #2 in SM3 and SM5, PIN 38(L), 32(Q).
In SM3 and SM5, this pin reflects the value of the DO2 bit in the sub-frame.
MF5:INT - Interrupt in SM4, PIN 38(L), 32(Q).
In SM4 this pin is an active low interrupt signal that is maskable using the MSK bit in the
control port serial data stream. INT is an open-collector output and requires and external
pull-up resistor. Assuming the mask bit is not set, and interrupt is triggered by a change in ADV
or DI1, or a rising edge on LCL or RCL, or when exiting an SCLK out of range condition
(Error = 3)
MF6:DI2 - Parallel Digital Bit Input #2 in SM3 and SM5, PIN 34(L), 28(Q).
In SM3 and SM5, this pin value is reflected in the DI2 bit of the sub-frame.
MF6:F1 - Format Bit 1 in SM4, PIN 34(L), 28(Q).
In SM4 this pin is a format bit and is used as one of three sample frequency select pins when in
master mode. In slave mode, MF6:F1 is used to determine the number of sub-frames within a
frame.
MF7:SFS1 - Sub-Frame Select 1 in SM3/SM4-SL, PIN 31(L), 25(Q).
In SM3, MF7:SFS1 helps select the sub-frame that this particular CS4218 is allocated. In slave
sub-mode of SM4, this pin is one of two pins used as a sub-frame select when MF6:F1 = 1
(128-bit frames). When MF6:F1 = 0, this pin is used to select the frame sizes of 32 or 64 bits.
MF7 - SM5, PIN 31(L), 25(Q).
In SM5, this pin is not used and should be tied to DGND.
MF7:F2 - Format Bit 2 in SM4-MA, PIN 31(L), 25(Q).
In master sub-mode of SM4, this pin is used as one of three sample frequency select pins.
MF8:SFS2 - Sub-Frame Select 2 in SM3/SM4-SL, PIN 30(L), 24(Q).
In SM3 and slave sub-mode of SM4, MF8:SFS2 helps select the sub-frame that this particular
CS4218 is allocated.
MF8 - SM5, PIN 30(L), 24(Q).
In SM5, this pin is not used and should be tied to DGND.
MF8:F3 - Format Bit 3 in SM4-MA, PIN 30(L), 24(Q).
In master sub-mode of SM4, this pin is a format bit and is one of three sample frequency select
pins.
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