
AD9549
Rev. D | Page 47 of 76
06744-
058
CSB
SCLK
SDIO
tHI
tLO
tCLK
tS
tDS
tDH
tH
BIT N
BIT N + 1
Figure 58. Serial Control Port Timing—Write
Table 12. Definitions of Terms Used in Serial Control Port Timing Diagrams
Parameter
Description
t
CLK
Period of SCLK
t
DV
Read data valid time (time from falling edge of SCLK to valid data on SDIO/SDO)
t
DS
Setup time between data and rising edge of SCLK
t
DH
Hold time between data and rising edge of SCLK
t
S
Setup time between CSB and SCLK
t
H
Hold time between CSB and SCLK
t
HI
Minimum period that SCLK should be in a logic high state
t
LO
Minimum period that SCLK should be in a logic low state