AM4376 datasheet(234/261 Pages) TI

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GPO[n:0]

GPI[m:0]

AM4376, AM4377, AM4378, AM4379

SPRS851B – JUNE 2014 – REVISED APRIL 2015

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5.12.16 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 AM437x Sitara Processors Technical Reference Manual

(SPRUHL7).

5.12.16.1 Programmable Real-Time Unit (PRU-ICSS PRU)

Table 5-100. PRU-ICSS PRU Timing Conditions

TIMING CONDITION PARAMETER

MIN

MAX

UNIT

Output Condition

Cload

Capacitive load for each bus line

5.12.16.1.1 PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing

Table 5-101. PRU-ICSS PRU Timing Requirements - Direct Input Mode

(see Figure 5-119)

NO.

MIN

MAX

UNIT

tw(GPI)

Pulse width, GPI

2*P(1)

tr(GPI)

Rise time, GPI

1.00

3.00

tf(GPI)

Fall time, GPI

1.00

3.00

tsk(GPI)

Internal skew between GPI[n:0] signals(2)

5.00

(1)

P = L3_CLK (PRU-ICSS ocp clock) period.

(2)

n = 16, 11 for PRU-ICSS1 and 19 for PRU-ICSS0

Figure 5-119. PRU-ICSS PRU Direct Input Timing

Table 5-102. PRU-ICSS PRU Switching Requirements - Direct Output Mode

(see Figure 5-120)

NO.

MIN

MAX

UNIT

tw(GPO)

Pulse width, GPO

2*P(1)

tr(GPO)

Rise time, GPO

1.00

3.00

tf(GPO)

Fall time, GPO

1.00

3.00

tsk(GPO)

Internal skew between GPO[n:0] signals(2)

5.00

(1)

P = L3_CLK (PRU-ICSS ocp clock) period.

(2)

n = 11 for PRU-ICSS1 and 19 for PRU-ICSS0

Figure 5-120. PRU-ICSS PRU Direct Output Timing

234

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