ADV
ANCEINFORMA
TION
WAKE
(A)
XCLKOUT
Address/Data
(internal)
t
w(WAKE)
t
d(WAKE-IDLE)
TMS320F28377S, TMS320F28376S, TMS320F28375S, TMS320F28374S
SPRS881A – AUGUST 2014 – REVISED JUNE 2015
5.7.8.3
Low-Power Mode Wakeup Timing
shows the IDLE mode timing requirements,
shows the switching characteristics,
and
shows the timing diagram for IDLE mode.
Table 5-28. IDLE Mode Timing Requirements
(1)
MIN
MAX
UNIT
Without input qualifier
2t
c(SYSCLK)
t
w(WAKE)
Pulse duration, external wakeup signal
cycles
With input qualifier
1t
c(SYSCLK)
+ t
w(IQSW)
(1)
For an explanation of the input qualifier parameters, see
Table 5-29. 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)
Without input qualifier
40t
c(SYSCLK)
•
Wakeup from Flash
–
Flash module in active state
With input qualifier
40t
c(SYSCLK)
+ t
w(WAKE)
t
d(WAKE-IDLE)
Without input qualifier
6700t
c(SYSCLK)
cycles
•
Wakeup from Flash
–
Flash module in sleep state
With input qualifier
6700t
c(SYSCLK)
+ t
w(WAKE)
Without input qualifier
25t
c(SYSCLK)
•
Wakeup from SARAM
With input qualifier
25t
c(SYSCLK)
+ t
w(WAKE)
(1)
For an explanation of the input qualifier parameters, see
(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 wakeup) signal involves additional latency.
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 wakeup signal could be asserted.
Figure 5-14. IDLE Entry and Exit Timing Diagram
Copyright © 2014–2015, Texas Instruments Incorporated
Specifications
75
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