CS89712 Datasheet, PDF (150/170 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH 10BASE-T ETHERNET CONTROLLER

CS89712
6.3 AC Characteristics
These are specified at V_DD = 3.3 volts and V_SS = 0 volts over an operating temperature of 0°C to +70°C. The timing
values are referenced to 1/2 V_DD.
Parameter
Symbol
Falling CS to data bus Hi-Z
t1
Address change to valid write data
t2
DATA in to falling EXPCLK setup time
t3
DATA in to falling EXPCLK hold time
t4
EXPRDY to falling EXPCLK setup time
t5
Falling EXPCLK to EXPRDY hold time
t6
Rising nMWE to data invalid hold time
t7
Sequential data valid to falling nMWE setup time
t8
Row address to falling nRAS setup time
t9
Falling nRAS to row address hold time
t10
Column address to falling nCAS setup time
t11
Falling nCAS to column address hold time
t12
Write data valid to falling nCAS setup time
t13
Write data valid from falling nCAS hold time
t14
LCD CL2 low time
t15
LCD CL2 high time
t16
LCD falling CL[2] to rising CL[1] delay
t17
LCD falling CL[1] to rising CL[2]
t18
LCD CL[1] high time
t19
LCD falling CL[1] to falling CL[2]
t20
LCD falling CL[1] to FRM toggle
t21
LCD falling CL[1] to M toggle
t22
LCD rising CL[2] to display data change
t23
Falling EXPCLK to address valid
t24
Data valid to falling nMWE for non sequential access only t25
SSICLK period (slave mode)
t31
SSICLK high
t32
SSICLK low
t33
SSICLK rise / fall time
t34
SSICLK rising to RX and / or TX frame sync
t35
SSICLK rising edge to frame sync low
t36
SSICLK rising edge to TX data valid
t37
SSIRXDA data set-up time
t38
SSIRXDA data hold time
t39
SSITXFR and / or SSIRXFR period
t40
18/36 MHz
Min
Max
0
25
0
35
18
—
0
—
18
—
0
50
5
—
–10
10
5
-
25
-
2
-
25
-
2
-
50
-
80
3,475
80
3,475
0
25
80
3,475
80
3,475
200
6,950
300
10,425
–10
20
–10
20
—
5
5
—
0
512
925
1025
925
1025
7
528
448
80
30
40
750
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note:
All SDRAM 36 MHz timings are for SDRAM operation.
The values for 36 MHz include 1 wait state, the 18 MHz values have 0 wait states.
150
DS502PP2