GPO[n:0]
3
1
2
GPI[m:0]
3
1
2
AM3359, AM3358, AM3357, AM3356, AM3354, AM3352
SPRS717H – OCTOBER 2011 – REVISED MAY 2015
7.14 Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem
(PRU-ICSS)
For more information, see the Programmable Real-Time Unit Subsystem and Industrial Communication
Subsystem Interface (PRU-ICSS) section of the
AM335x Sitara Processors Technical Reference Manual
(
).
7.14.1 Programmable Real-Time Unit (PRU-ICSS PRU)
Table 7-91. PRU-ICSS PRU Timing Conditions
PARAMETER
MIN
MAX
UNIT
Output Condition
C
load
Capacitive load for each bus line
30
pF
7.14.1.1 PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing
Table 7-92. PRU-ICSS PRU Timing Requirements - Direct Input Mode
(see
NO.
MIN
MAX
UNIT
1
t
w(GPI)
Pulse width, GPI
2 × P
(1)
ns
2
t
r(GPI)
Rise time, GPI
1.00
3.00
ns
t
f(GPI)
Fall time, GPI
1.00
3.00
ns
3
t
sk(GPI)
Internal skew between GPI[n:0] signals
(2)
PRU0
1.00
ns
PRU1
3.00
(1)
P = L3_CLK (PRU-ICSS ocp clock) period.
(2)
n = 16
Figure 7-96. PRU-ICSS PRU Direct Input Timing
Table 7-93. PRU-ICSS PRU Switching Requirements – Direct Output Mode
(see
NO.
PARAMETER
MIN
MAX
UNIT
1
t
w(GPO)
Pulse width, GPO
2 × P
(1)
ns
2
t
r(GPO)
Rise time, GPO
1.00
3.00
ns
t
f(GPO)
Fall time, GPO
1.00
3.00
ns
3
t
sk(GPO)
Internal skew between GPO[n:0] signals
(2)
PRU0
1.00
ns
PRU1
5.00
(1)
P = L3_CLK (PRU-ICSS ocp clock) period
(2)
n = 15
Figure 7-97. PRU-ICSS PRU Direct Output Timing
224
Peripheral Information and Timings
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