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CLOCKOUT

DATAOUT

PRSO1

PRSO2H

PRSO3

SPRSP08_TIMING_PRU_06

PRSO2L

DATAIN

PRSI1

PRSI2

SPRSP08_TIMING_PRU_05

221

AM6548, AM6528, AM6546

AM6526, AM6527

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SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018

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Specifications

Table 5-96. PRU_ICSSG PRU Timing Requirements - Shift In Mode

NO.

PARAMETER

DESCRIPTION

MODE

MIN

MAX

UNIT

PRSI1

tw(PRU_DATAINL)

Pulse Duration, PRU_DATAIN Low

2+2*P (1)

PRSI2

tw(PRU_DATAINH)

Pulse Duration, PRU_DATAIN High

2+2*P (1)

(1) P = Internal shift in clock period, defined by PRU0_GPI_DIV0 and PRU0_GPI_DIV1 bit fields in the GPCFGn register.

Figure 5-105. PRU_ICSSG PRU Shift In Timing

Table 5-97. PRU_ICSSG PRU Switching Characteristics - Shift Out Mode

NO.

PARAMETER

DESCRIPTION

MODE

MIN

MAX

UNIT

PRSO1

tc(PRU_CLKOUT)

Cycle time, PRU_CLKOUT

PRSO2

tw(PRU_CLKOUTL)

Pulse Duration, PRU_CLKOUT Low

-0.3 +

0.475*P*Z

(1)(2)

PRSO3

tw(PRU_CLKOUTH)

Pulse Duration, PRU_CLKOUT High

-0.3 +

0.475*P*Y

(1)(3)

PRSO4

td(PRU_CLKOUT-

PRU_DATAOUT)

Delay time, PRU_CLKOUT to PRU_DATAOUT Valid

(1) P = Software programmable shift out clock period, defined by PRU0_GPO_DIV0 and PRU0_GPO_DIV1 bit fields in the GPCFGn

(2) The Z parameter is defined as follows: If PRU0_GPI_DIV0 and PRU0_GPI_DIV1 are INTEGERS -or- if PRU0_GPI_DIV0 is a NON-

INTEGER and PRU0_GPI_DIV1 is an EVEN INTEGER then, Z equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1). If PRU0_GPI_DIV0 is a

NON-INTEGER and PRU0_GPI_DIV1 is an ODD INTEGER then, Z equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1 + 0.5). If

PRU0_GPI_DIV0 is an INTEGER and PRU0_GPI_DIV1 is a NON-INTEGER then, Z equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1 + 0.5

* PRU0_GPI_DIV0). If PRU0_GPI_DIV0 and PRU0_GPI_DIV1 are NON-INTEGERS then, Z equals (PRU0_GPI_DIV0 *

PRU0_GPI_DIV1 + 0.25 * PRU0_GPI_DIV0).

(3) The Y parameter is defined as follows: If PRU0_GPI_DIV0 and PRU0_GPI_DIV1 are INTEGERS -or- if PRU0_GPI_DIV0 is a NON-

INTEGER and PRU0_GPI_DIV1 is an EVEN INTEGER then, Y equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1). If PRU0_GPI_DIV0 is a

NON-INTEGER and PRU0_GPI_DIV1 is an ODD INTEGER then, Y equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1 - 0.5). If

PRU0_GPI_DIV0 is an INTEGER and PRU0_GPI_DIV1 is a NON-INTEGER then, Y equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1 - 0.5

* PRU0_GPI_DIV0). If PRU0_GPI_DIV0 and PRU0_GPI_DIV1 are NON-INTEGERS then, Y1 equals (PRU0_GPI_DIV0 *

PRU0_GPI_DIV1 - 0.25 * PRU0_GPI_DIV0) and Y2 equals (PRU0_GPI_DIV0 * PRU0_GPI_DIV1 + 0.25 * PRU0_GPI_DIV0), where Y1

is the first high pulse and Y2 is the second high pulse.

Figure 5-106. PRU_ICSSG PRU Shift Out Timing

5.11.5.21.1.4

PRU_ICSSG PRU Sigma Delta and Peripheral Interface Modes Electrical Data and Timing

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