Switching characteristics - serial port, Figure 4. serial port write timing diagram, Figure 5. serial port read timing diagram – Cirrus Logic CS61584A User Manual
Page 10: Figure 4, Serial port write timing diagram, Figure 5, Serial port read timing diagram, Ds261pp5
CS61584A
10
DS261PP5
DS261PP5
SWITCHING CHARACTERISTICS - SERIAL PORT
(T
A
= -40 to 85 °C; DV+, TV+, RV+ =
nominal ± 0.3 V; Inputs: Logic 0 = 0 V, Logic 1 = RV+)
Notes: 28. If SPOL = 0, then CS should return high no sooner than 20 ns after the 16
th
rising edge of SCLK during
a serial port read.
29. Output load capacitance = 50 pF.
Parameter
Symbol
Min
Typ
Max
Unit
SDI to SCLK Setup Time
t
dc
25
-
-
ns
SCLK to SDI Hold Time
t
cdh
25
-
-
ns
SCLK Low Time
t
cl
50
-
-
ns
SCLK High Time
t
ch
50
-
-
ns
SCLK Rise and Fall Time
t
r
, t
f
-
-
15
ns
CS to SCLK Setup Time
t
cc
20
-
-
ns
SCLK to CS Hold Time
(Note 28)
t
cch
20
-
-
ns
CS Inactive Time
t
cwh
100
-
-
ns
SDO Valid to SCLK
(Note 29)
t
cdv
-
-
50
ns
CS to SDO High Z
t
cdz
-
50
-
ns
t
dc
t
cc
LSB
LSB
MSB
CONTROL BYTE
DATA BYTE
CS
SCLK
SDI
t
ch
t
cwh
t
cch
t
cdh
t
cl
t
cdh
Figure 4. Serial Port Write Timing Diagram
HIGH
CS
SCLK
SDO
SPOL = 0
t
cdz
cdv
t
Figure 5. Serial Port Read Timing Diagram
CS61584A
10
DS261F1