Datasheet

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AM3359, AM3358, AM3357
AM3356, AM3354, AM3352
SPRS717E –OCTOBER 2011–REVISED JANUARY 2013 www.ti.com
Table 5-75. Switching Characteristics Over Recommended Operating Conditions for McASP
(1)
(see Figure 5-85)
NO. MIN MAX UNIT
9 t
c(AHCLKRX)
Cycle time, MCA[X]_AHCLKR and MCA[X]_AHCLKX 20
(2)
ns
0.5P -
10 t
w(AHCLKRX)
Pulse duration, MCA[X]_AHCLKR and MCA[X]_AHCLKX high or low ns
2.5
(3)
11 t
c(ACLKRX)
Cycle time, MCA[X]_ACLKR and MCA[X]_ACLKX 20 ns
0.5P -
12 t
w(ACLKRX)
Pulse duration, MCA[X]_ACLKR and MCA[X]_ACLKX high or low ns
2.5
(3)
ACLKR and
0 6
Delay time, MCA[X]_ACLKR and MCA[X]_ACLKX
ACLKX int
transmit edge to MCA[x]_AFSR and MCA[x]_AFSX
ACLKR and
output valid
1 13.5
13 t
d(ACLKRX-AFSRX)
ACLKX ext in ns
Delay time, MCA[X]_ACLKR and MCA[X]_ACLKX
ACLKR and
transmit edge to MCA[x]_AFSR and MCA[x]_AFSX 1 13.5
ACLKX ext out
output valid with Pad Loopback
ACLKX int 0 6
Delay time, MCA[X]_ACLKX transmit edge to
MCA[X]_AXR output valid
ACLKX ext in 1 13.5
14 t
d(ACLKX-AXR)
ns
Delay time, MCA[X]_ACLKX transmit edge to
ACLKX ext out 1 13.5
MCA[X]_AXR output valid with Pad Loopback
ACLKX int 0 6
Disable time, MCA[X]_ACLKX transmit edge to
MCA[X]_AXR output high impedance
ACLKX ext in 1 13.5
15 t
dis(ACLKX-AXR)
ns
Disable time, MCA[X]_ACLKX transmit edge to
ACLKX ext out 1 13.5
MCA[X]_AXR output high impedance with Pad Loopback
(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) 50 MHz
(3) P = AHCLKR and AHCLKX period.
206 Peripheral Information and Timings Copyright © 2011–2013, Texas Instruments Incorporated
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