TMS320F28076PZP datasheet(64/192 Pages) TI

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7.9.8.3 Low-Power Mode Wakeup Timing

Section 7.9.8.3.1 shows the IDLE mode timing requirements, Section 7.9.8.3.2 shows the switching

characteristics, and Figure 7-17 shows the timing diagram for IDLE mode.

7.9.8.3.1 IDLE Mode Timing Requirements

MIN

MAX

UNIT(1)

tw(WAKE)

Pulse duration, external wake-up signal

Without input qualifier

2tc(SYSCLK)

cycles

With input qualifier

2tc(SYSCLK) + tw(IQSW)

(1)

For an explanation of the input qualifier parameters, see Section 7.9.6.2.1.

7.9.8.3.2 IDLE Mode Switching Characteristics

over recommended operating conditions (unless otherwise noted)(1)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

td(WAKE-IDLE)

Delay time, external wake signal to program execution resume (2)

cycles

•

Wakeup from Flash

–

Flash module in active state

Without input qualifier

40tc(SYSCLK)

With input qualifier

40tc(SYSCLK) + tw(WAKE)

•

Wakeup from Flash

–

Flash module in sleep state

Without input qualifier

6700tc(SYSCLK) (3)

With input qualifier

6700tc(SYSCLK) (3) + tw(WAKE)

•

Wakeup from RAM

Without input qualifier

25tc(SYSCLK)

With input qualifier

25tc(SYSCLK) + tw(WAKE)

(1)

For an explanation of the input qualifier parameters, see Section 7.9.6.2.1.

(2)

This is the time taken to begin execution of the instruction that immediately follows the IDLE instruction. Execution of an ISR (triggered

by the wake-up signal) involves additional latency.

(3)

This value is based on the flash power-up time, which is a function of the SYSCLK frequency, flash wait states (RWAIT), and

FPAC1[PSLEEP]. For more information, see the Flash and OTP Power-Down Modes and Wakeup section of the TMS320F2807x

Microcontrollers Technical Reference Manual . This value can be realized when SYSCLK is 120 MHz, RWAIT is 2, and

FPAC1[PSLEEP] is 0x860.

WAKE

(A)

XCLKOUT

Address/Data

(internal)

w(WAKE)

d(WAKE-IDLE)

A. WAKE can be any enabled interrupt, WDINT or XRS. After the IDLE instruction is executed, a delay of five OSCCLK cycles (minimum) is

needed before the wake-up signal could be asserted.

Figure 7-17. IDLE Entry and Exit Timing Diagram

TMS320F28076, TMS320F28075

SPRS902J – OCTOBER 2014 – REVISED FEBRUARY 2021

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