AM3359_017 Datasheet, PDF (211/253 Pages) Texas Instruments – Sitara Processors

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AM3359, AM3358, AM3357, AM3356, AM3354, AM3352, AM3351
SPRS717J – OCTOBER 2011 – REVISED APRIL 2016
7.11.2 McASP Electrical Data and Timing
Table 7-77. McASP Timing Conditions
PARAMETER
MIN
Input Conditions
t_R
Input signal rise time
1⁽¹⁾
t_F
Input signal fall time
1⁽¹⁾
Output Condition
C_LOAD
Output load capacitance
15
(1) Except when specified otherwise.
TYP
MAX UNIT
4⁽¹⁾
ns
4⁽¹⁾
ns
30 pF
Table 7-78. Timing Requirements for McASP⁽¹⁾
(see Figure 7-86)
OPP100
NO.
MIN MAX
1 t_c(AHCLKRX)
Cycle time, McASP[x]_AHCLKR and
McASP[x]_AHCLKX
20
2 t_w(AHCLKRX)
Pulse duration, McASP[x]_AHCLKR and
McASP[x]_AHCLKX high or low
0.5P - 2.5⁽²⁾
3 t_c(ACLKRX)
Cycle time, McASP[x]_ACLKR and
McASP[x]_ACLKX
20
4 t_w(ACLKRX)
Pulse duration, McASP[x]_ACLKR and
McASP[x]_ACLKX high or low
0.5R - 2.5⁽³⁾
5 ^tsu(AFSRX-
ACLKRX)
Setup time, McASP[x]_AFSR and
McASP[x]_AFSX input valid before
McASP[x]_ACLKR and
McASP[x]_ACLKX
ACLKR and
ACLKX int
ACLKR and
ACLKX ext in
ACLKR and
ACLKX ext out
11.5
4
4
Hold time, McASP[x]_AFSR and
ACLKR and
ACLKX int
-1
6 ^th(ACLKRX-
AFSRX)
McASP[x]_AFSX input valid after
McASP[x]_ACLKR and
ACLKR and
ACLKX ext in
0.4
McASP[x]_ACLKX
ACLKR and
ACLKX ext out
0.4
ACLKR and
ACLKX int
7
Setup time, McASP[x]_AXR input
t_{su(AXR-ACLKRX)} valid before McASP[x]_ACLKR and
McASP[x]_ACLKX
ACLKR and
ACLKX ext in
ACLKR and
ACLKX ext out
11.5
4
4
ACLKR and
ACLKX int
-1
Hold time, McASP[x]_AXR input
8 t_{h(ACLKRX-AXR)} valid after McASP[x]_ACLKR and
McASP[x]_ACLKX
ACLKR and
ACLKX ext in
0.4
ACLKR and
ACLKX ext out
0.4
(1) ACLKR internal: ACLKRCTL.CLKRM = 1, PDIR.ACLKR = 1
ACLKR external input: ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 0
ACLKR external output: ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 1
ACLKX internal: ACLKXCTL.CLKXM = 1, PDIR.ACLKX = 1
ACLKX external input: ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 0
ACLKX external output: ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 1
(2) P = McASP[x]_AHCLKR and McASP[x]_AHCLKX period in nanoseconds (ns).
(3) R = McASP[x]_ACLKR and McASP[x]_ACLKX period in ns.
OPP50
MIN
40
UNIT
MAX
ns
0.5P - 2.5⁽²⁾
ns
40
ns
0.5R - 2.5⁽³⁾
ns
15.5
6
ns
6
-1
0.4
ns
0.4
15.5
6
ns
6
-1
0.4
ns
0.4
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