AM4376 Datasheet, PDF (221/266 Pages) Texas Instruments – AM437x Sitara Processors

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AM4376, AM4377, AM4378, AM4379
SPRS851C – JUNE 2014 – REVISED APRIL 2016
5.13.12.2 McASP Electrical Data and Timing
Table 5-86. McASP Timing Conditions
TIMING CONDITION PARAMETER
Input Conditions
t_R
Input signal rise time
t_F
Input signal fall time
Output Condition
C_LOAD
Output load capacitance
(1) Except when specified otherwise.
MIN TYP
1⁽¹⁾
1⁽¹⁾
15
MAX UNIT
4⁽¹⁾
ns
4⁽¹⁾
ns
30 pF
Table 5-87. Timing Requirements for McASP⁽¹⁾
(see Figure 5-104)
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
12.3
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
1.6
McASP[x]_ACLKX
ACLKR and
ACLKX ext out
1.6
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
12.3
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
1.6
ACLKR and
ACLKX ext out
1.6
(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 nano seconds (ns).
(3) R = McASP[x]_ACLKR and McASP[x]_ACLKX period in ns.
OPP50
MIN
38.46
UNIT
MAX
ns
0.5P - 2.5⁽²⁾
ns
38.46
ns
0.5R - 2.5⁽³⁾
ns
15.5
6
ns
6
-1
2.3
ns
2.3
15.5
6
ns
6
-1
2.3
ns
2.3
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Specifications 221