CS4398CZZR View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS4398CZZR' PDF : 46 Pages View PDF
CS4398
CS
CCLK
CDIN
CHIP
ADDRESS
1001100
MAP
DATA
R/W
MSB
LSB
byte 1
MAP = Memory Address Pointer
byte n
Figure 15. Control Port Timing, SPI Format (Write)
5.5.2
Reading in SPI
Figure 16 shows the operation of the Control Port in SPI format. To read to a register, bring CS low. The
first seven bits on CDIN form the chip address and must be 1001100. The eighth bit is a read/write control
(R/W), which must be high to read. The CDOUT line will then output the data from the register designated
by the MAP. To read multiple registers, keep CS low and continue providing clocks on CCLK. End the
read transaction by setting CS high. The CDOUT line will go to a high-impedance state once CS goes
high.
CS
CCLK
C D IN
CDOUT
C H IP
ADDRESS
1001100
R /W
MSB
DATA
LSB
byte 1
byte n
Figure 16. Control Port Timing, SPI Format (Read)
DS568F1
27
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