Table 4-30 IDLE Mode Switching Characteristics(1)
over recommended operating conditions (unless otherwise noted)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) |
|
Without input qualifier |
| 25tc(SYSCLK) |
With input qualifier |
| 25tc(SYSCLK) + tw(WAKE) |
(1) For an explanation of the input qualifier parameters, see
Table 4-24.
(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
TMS320F2837xD Dual-Core Delfino Microcontrollers Technical Reference Manual. This value can be realized when SYSCLK is 200 MHz, RWAIT is 3, and FPAC1[PSLEEP] is 0x860.
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 4-18 IDLE Entry and Exit Timing Diagram
Table 4-31 shows the STANDBY mode timing requirements, Table 4-32 shows the switching characteristics, and Figure 4-19 shows the timing diagram for STANDBY mode.