Texas Instruments AM335x Sitara

GPO[n:0]
3
1
2
GPI[m:0]
3
1
2
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SPRS717H –OCTOBER 2011–REVISED MAY 2015 www.ti.com
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
(SPRUH73).
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 Figure 7-96)
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 Figure 7-69)
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
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