Texas Instruments AM335x Sitara

AM3359, AM3358, AM3357, AM3356, AM3354, AM3352
www.ti.com SPRS717H –OCTOBER 2011–REVISED MAY 2015
7.11.2 McASP Electrical Data and Timing
Table 7-77. McASP Timing Conditions
PARAMETER MIN TYP MAX UNIT
Input Conditions
t
R
Input signal rise time 1
(1)
4
(1)
ns
t
F
Input signal fall time 1
(1)
4
(1)
ns
Output Condition
C
LOAD
Output load capacitance 15 30 pF
(1) Except when specified otherwise.
Table 7-78. Timing Requirements for McASP
(1)
(see Figure 7-86)
OPP100 OPP50
NO. UNIT
MIN MAX MIN MAX
Cycle time, McASP[x]_AHCLKR and
1 t
c(AHCLKRX)
20 40 ns
McASP[x]_AHCLKX
Pulse duration, McASP[x]_AHCLKR and
2 t
w(AHCLKRX)
0.5P - 2.5
(2)
0.5P - 2.5
(2)
ns
McASP[x]_AHCLKX high or low
Cycle time, McASP[x]_ACLKR and
3 t
c(ACLKRX)
20 40 ns
McASP[x]_ACLKX
Pulse duration, McASP[x]_ACLKR and
4 t
w(ACLKRX)
0.5R - 2.5
(3)
0.5R - 2.5
(3)
ns
McASP[x]_ACLKX high or low
ACLKR and
11.5 15.5
ACLKX int
Setup time, McASP[x]_AFSR and
t
su(AFSRX-
McASP[x]_AFSX input valid before ACLKR and
5 4 6 ns
ACLKRX)
McASP[x]_ACLKR and ACLKX ext in
McASP[x]_ACLKX
ACLKR and
4 6
ACLKX ext out
ACLKR and
-1 -1
ACLKX int
Hold time, McASP[x]_AFSR and
t
h(ACLKRX-
McASP[x]_AFSX input valid after ACLKR and
6 0.4 0.4 ns
AFSRX)
McASP[x]_ACLKR and ACLKX ext in
McASP[x]_ACLKX
ACLKR and
0.4 0.4
ACLKX ext out
ACLKR and
11.5 15.5
ACLKX int
Setup time, McASP[x]_AXR input
ACLKR and
7 t
su(AXR-ACLKRX)
valid before McASP[x]_ACLKR and 4 6 ns
ACLKX ext in
McASP[x]_ACLKX
ACLKR and
4 6
ACLKX ext out
ACLKR and
-1 -1
ACLKX int
Hold time, McASP[x]_AXR input
ACLKR and
8 t
h(ACLKRX-AXR)
valid after McASP[x]_ACLKR and 0.4 0.4 ns
ACLKX ext in
McASP[x]_ACLKX
ACLKR and
0.4 0.4
ACLKX ext out
(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.
Copyright © 2011–2015, Texas Instruments Incorporated Peripheral Information and Timings 211
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