AM6421 datasheet(192/237 Pages) TI

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CLOCKIN

DATAIN

PRPC1

PRPC2

PRPC3

PRPC5

PRU_TIMING_04

PRPC4

Figure 7-86. PRU_ICSSG PRU Parallel Capture Timing Requirements – Falling Edge Mode

7.10.5.16.1.3 PRU_ICSSG PRU Shift Mode Timing

Table 7-85. PRU_ICSSG PRU Timing Requirements – Shift In Mode

see Figure 7-87

NO.

PARAMETER

DESCRIPTION

MIN

MAX

UNIT

PRSI1

tw(DATAINH)

Pulse duration, DATAIN high

2+2*P

(1)

PRSI2

tw(DATAINL)

Pulse duration, DATAIN low

2+2*P

(1)

P = Internal shift in clock period, defined by PRUn_GPI_DIV0 and PRUn_GPI_DIV1 bit fields in the ICSSG_GPCFGn_REG register.

PRUn represents the respective PRU0 or PRU1 instance.

DATAIN

PRSI1

PRSI2

PRU_TIMING_05

Figure 7-87. PRU_ICSSG PRU Shift In Timing

Table 7-86. PRU_ICSSG PRU Switching Characteristics – Shift Out Mode

see Figure 7-88

NO.

PARAMETER

DESCRIPTION

MIN

MAX

UNIT

PRSO1

tc(CLOCKOUT)

Cycle time, CLOCKOUT

PRSO2L

tw(CLOCKOUTL)

Pulse duration, CLOCKOUT low

-0.3 +

0.475*P*Z

(1)(2)

PRSO2H

tw(CLOCKOUTH)

Pulse duration, CLOCKOUT high

-0.3 +

0.475*P*Y

(1)(3)

PRSO3

td(CLOCKOUT-DATAOUT) Delay time, CLOCKOUT to DATAOUT valid

-1

(1)

P = Software programmable shift out clock period, defined by PRUn_GPO_DIV0 and PRUn_GPO_DIV1 bit fields in the

ICSSG_GPCFGn_REG register, where PRUn represents the respective PRU0 or PRU1 instance.

(2)

The Z parameter is defined as follows, where PRUn represents the respective PRU0 or PRU1 instance.

a. If PRUn_GPI_DIV0 and PRUn_GPI_DIV1 are INTEGERS -or- if PRUn_GPI_DIV0 is a NON-INTEGER and PRUn_GPI_DIV1 is an

EVEN INTEGER then, Z equals (PRUn_GPI_DIV0 * PRUn_GPI_DIV1).

b. If PRUn_GPI_DIV0 is a NON-INTEGER and PRUn_GPI_DIV1 is an ODD INTEGER then, Z equals (PRUn_GPI_DIV0 *

PRUn_GPI_DIV1 + 0.5).

c. If PRUn_GPI_DIV0 is a NON-INTEGER and PRUn_GPI_DIV1 is an ODD INTEGER then, Z equals (PRUn_GPI_DIV0 *

PRUn_GPI_DIV1 + 0.5).

d. If PRUn_GPI_DIV0 is an INTEGER and PRUn_GPI_DIV1 is a NON-INTEGER then, Z equals (PRUn_GPI_DIV0 *

PRUn_GPI_DIV1 + 0.5 * PRUn_GPI_DIV0). If PRUn_GPI_DIV0 and PRUn_GPI_DIV1 are NON-INTEGERS then, Z equals

(PRUn_GPI_DIV0 * PRUn_GPI_DIV1 + 0.25 * PRUn_GPI_DIV0).

(3)

The Y parameter is defined as follows, where PRUn represents the respective PRU0 or PRU1 instance.

AM6442, AM6441, AM6421

AM6412, AM6411

SPRSP56 – JANUARY 2021

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