AM3359_16 Datasheet, PDF (224/253 Pages) Texas Instruments – Sitara Processors

AM3359, AM3358, AM3357, AM3356, AM3354, AM3352, AM3351
SPRS717J – OCTOBER 2011 – REVISED APRIL 2016
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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
Output Condition
C_load
Capacitive load for each bus line
MAX UNIT
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.
1
2
3
t_w(GPI)
t_r(GPI)
t_f(GPI)
t_sk(GPI)
Pulse width, GPI
Rise time, GPI
Fall time, GPI
Internal skew between GPI[n:0] signals⁽²⁾
PRU0
PRU1
MIN
2 × P ⁽¹⁾
1.00
1.00
(1) P = L3_CLK (PRU-ICSS ocp clock) period.
(2) n = 16
2
1
MAX
3.00
3.00
1.00
3.00
UNIT
ns
ns
ns
ns
GPI[m:0]
3
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.
1
2
3
t_w(GPO)
t_r(GPO)
t_f(GPO)
t_sk(GPO)
PARAMETER
Pulse width, GPO
Rise time, GPO
Fall time, GPO
Internal skew between GPO[n:0] signals⁽²⁾
PRU0
PRU1
MIN
2 × P ⁽¹⁾
1.00
1.00
MAX
3.00
3.00
1.00
5.00
(1) P = L3_CLK (PRU-ICSS ocp clock) period
(2) n = 15
2
1
UNIT
ns
ns
ns
ns
GPO[n:0]
3
Figure 7-97. PRU-ICSS PRU Direct Output Timing
224 Peripheral Information and Timings
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