EP7212 Datasheet, PDF (98/136 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)

EP7212
6.4 AC Characteristics
All characteristics are specified at V_DD = 2.3 to 2.7 volts and V_SS = 0 volts over an operating temperature
of 0°C to +70°C. Those characteristics marked with a # will be significantly different for 13 MHz mode
because the EXPCLK is provided as an input rather than generated internally. These timings are estimated
at present. The timing values are referenced to 1/2 V_DD.
Symbol
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
t11
t12
t13
t14
t15
t16
t17
t18
t19
t20
t21
t22
t23
t24
t25
t31
t32
t33
t34
t35
t36
t37
t38
Parameter
Falling CS to data bus Hi-Z
Address change to valid write data
DATA in to falling EXPCLK setup time
DATA in to falling EXPCLK hold time
EXPRDY to falling EXPCLK setup time
Falling EXPCLK to EXPRDY hold time
Rising nMWE to data invalid hold time
Sequential data valid to falling nMWE setup time
Row address to falling nRAS setup time
Falling nRAS to row address hold time
Column address to falling nCAS setup time
Falling nCAS to column address hold time
Write data valid to falling nCAS setup time
Write data valid from falling nCAS hold time
LCD CL2 low time
LCD CL2 high time
LCD falling CL[2] to rising CL[1] delay
LCD falling CL[1] to rising CL[2]
LCD CL[1] high time
LCD falling CL[1] to falling CL[2]
LCD falling CL[1] to FRM toggle
LCD falling CL[1] to M toggle
LCD rising CL[2] to display data change
Falling EXPCLK to address valid
Data valid to falling nMWE for non sequential access only
SSICLK period (slave mode)
SSICLK high
SSICLK low
SSICLK rise / fall time
SSICLK rising to RX and / or TX frame sync
SSICLK rising edge to frame sync low
SSICLK rising edge to TX data valid
SSIRXDA data set-up time
13 MHz
Min
Max
0
35
0
45
0#
—
10 #
—
0#
—
10 #
50
10
—
–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
—
33 #
5
—
0
512
925
1025
925
1025
7
528
448
80
30
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
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
Table 58. AC Timing Characteristics
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