Datasheet

WAKE INT
(A)(B)
XCLKOUT
Address/Data
(internal)
t
d(WAKE−IDLE)
t
w(WAKE−INT)
TMS320F28069, TMS320F28068, TMS320F28067, TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
SPRS698D –NOVEMBER 2010–REVISED DECEMBER 2012 www.ti.com
5.23.1.4 Low-Power Mode Wakeup Timing
Table 5-70 shows the timing requirements, Table 5-71 shows the switching characteristics, and Figure 5-
54 shows the timing diagram for IDLE mode.
Table 5-70. IDLE Mode Timing Requirements
(1)
MIN MAX UNIT
Without input qualifier 2t
c(SCO)
t
w(WAKE-INT)
Pulse duration, external wake-up signal cycles
With input qualifier 5t
c(SCO)
+ t
w(IQSW)
(1) For an explanation of the input qualifier parameters, see Table 5-69.
Table 5-71. IDLE Mode Switching Characteristics
(1)
over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Delay time, external wake signal to program execution resume
(2)
cycles
Without input qualifier 20t
c(SCO)
cycles
• Wake-up from Flash
– Flash module in active state With input qualifier 20t
c(SCO)
+ t
w(IQSW)
t
d(WAKE-IDLE)
Without input qualifier 1050t
c(SCO)
cycles
• Wake-up from Flash
– Flash module in sleep state With input qualifier 1050t
c(SCO)
+ t
w(IQSW)
Without input qualifier 20t
c(SCO)
cycles
• Wake-up from SARAM
With input qualifier 20t
c(SCO)
+ t
w(IQSW)
(1) For an explanation of the input qualifier parameters, see Table 5-69.
(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.
A. WAKE INT can be any enabled interrupt, WDINT or XRS. After the IDLE instruction is executed, a delay of 5
OSCCLK cycles (minimum) is needed before the wake-up signal could be asserted.
B. From the time the IDLE instruction is executed to place the device into low-power mode (LPM), wakeup should not be
initiated until at least 4 OSCCLK cycles have elapsed.
Figure 5-54. IDLE Entry and Exit Timing
150 Peripheral and Electrical Specifications Copyright © 2010–2012, Texas Instruments Incorporated
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