5.5.2 Reading in SPI Figure 16 shows the operation of the Control P" />
參數(shù)資料
型號: CDB4398
廠商: Cirrus Logic Inc
文件頁數(shù): 20/46頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR CS4398 DAC
標(biāo)準包裝: 1
DAC 的數(shù)量: 2
位數(shù): 24
采樣率(每秒): 192k
數(shù)據(jù)接口: I²C,SPI?
DAC 型: 電壓
工作溫度: -10°C ~ 70°C
已供物品: 板,線纜
已用 IC / 零件: CS4398
產(chǎn)品目錄頁面: 757 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 598-1067-5-ND - IC DAC 120DB 192KHZ W/VC 28TSSOP
其它名稱: 598-1155
DS568F1
27
CS4398
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.
Figure 16. Control Port Timing, SPI Format (Read)
MAP
MSB
LSB
DATA
byte 1
byte n
R/W
MAP = Memory Address Pointer
ADDRESS
CHIP
CDIN
CCLK
CS
10 01 10 0
LS B
by te 1
b yte n
R/W
A DDRE SS
CHIP
CD IN
CC L K
CS
10 01 10 0
MS B
DATA
CDO UT
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