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SPRS717F –OCTOBER 2011–REVISED APRIL 2013
5.10.2 McASP Electrical Data and Timing
Table 5-77. McASP Timing Conditions
TIMING CONDITION PARAMETER
MIN
TYP
MAX
UNIT
Input Conditions
tR
tF
Input signal rise time
Input signal fall time
1(1)
1(1)
4(1)
4(1)
ns
ns
Output Condition
CLOAD Output load capacitance
15
30
pF
(1) Except when specified otherwise.
Table 5-78. Timing Requirements for McASP(1)
(see Figure 5-86)
OPP100
OPP50
MIN
NO.
UNIT
MIN
MAX
MAX
Cycle time, McASP[x]_AHCLKR and
McASP[x]_AHCLKX
1
2
3
4
tc(AHCLKRX)
tw(AHCLKRX)
tc(ACLKRX)
tw(ACLKRX)
20
40
ns
ns
ns
ns
Pulse duration, McASP[x]_AHCLKR and
McASP[x]_AHCLKX high or low
0.5P - 2.5(2)
0.5P - 2.5(2)
Cycle time, McASP[x]_ACLKR and
McASP[x]_ACLKX
20
40
Pulse duration, McASP[x]_ACLKR and
McASP[x]_ACLKX high or low
0.5R - 2.5(3)
0.5R - 2.5(3)
ACLKR and
ACLKX int
11.5
4
15.5
6
Setup time, McASP[x]_AFSR and
McASP[x]_AFSX input valid before
McASP[x]_ACLKR and
tsu(AFSRX-
ACLKRX)
ACLKR and
ACLKX ext in
5
6
7
8
ns
ns
ns
ns
McASP[x]_ACLKX
ACLKR and
ACLKX ext out
4
6
ACLKR and
ACLKX int
-1
-1
Hold time, McASP[x]_AFSR and
McASP[x]_AFSX input valid after
McASP[x]_ACLKR and
th(ACLKRX-
AFSRX)
ACLKR and
ACLKX ext in
0.4
0.4
11.5
4
0.4
0.4
15.5
6
McASP[x]_ACLKX
ACLKR and
ACLKX ext out
ACLKR and
ACLKX int
Setup time, McASP[x]_AXR input
tsu(AXR-ACLKRX) valid before McASP[x]_ACLKR and
McASP[x]_ACLKX
ACLKR and
ACLKX ext in
ACLKR and
ACLKX ext out
4
6
ACLKR and
ACLKX int
-1
-1
Hold time, McASP[x]_AXR input
th(ACLKRX-AXR) valid after McASP[x]_ACLKR and
McASP[x]_ACLKX
ACLKR and
ACLKX ext in
0.4
0.4
0.4
0.4
ACLKR and
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 nano seconds (ns).
(3) R = McASP[x]_ACLKR and McASP[x]_ACLKX period in ns.
Copyright © 2011–2013, Texas Instruments Incorporated
Peripheral Information and Timings
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