CS4235
TM
CrystalClear Low Cost ISA Audio System
Timing Parameters (TA = 25 °C; VA, VD1, VDF1-VDF3 = +5 V; outputs loaded with 30 pF;
Input Levels: Logic 0 = 0 V, Logic 1 = VDF, Rise/Fall time = 2 ns; Input/Output reference levels = 2.5 V)
Parameter
E2PROM Timing (Note 1)
Symbol
Min
Max
Units
SCL Low to SDA Data Out Valid
Start Condition Hold Time
Clock Low Period
tAA
0
4.0
4.7
4.0
4.7
0
3.5
µs
µs
µs
µs
µs
µs
ns
µs
ns
µs
ns
tHD:STA
tLSCL
-
-
Clock High Period
tHSCL
-
Start Condition Setup Time (for a Repeated Start Condition) tSU:STA
-
Data In Hold Time
tHD:DAT
tSU:DAT
tR
-
Data In Setup Time
250
-
-
1
SDA and SCL Rise Time
SDA and SCL Fall Time
Stop Condition Setup Time
Data Out Hold Time
(Note 7)
tF
-
300
-
tSU:STO
tDH
4.7
0
-
Notes 7. Rise time on SDA is determined by the capacitance of the SDA line with all connected gates and the
external pullup resistor required.
t
t
HSCL
LSCL
t
t
F
R
SCL
t
t
t
t
t
SU:STA
HD:STA HD:DAT
SU:DAT
SU:STO
SDA (IN)
t
t
DH
AA
SDA (OUT)
E2PROM 2-Wire Interface Timing
DS252PP2
7
CIRRUS [ CIRRUS LOGIC ]
