Texas Instruments SM320F2812-HT Manuale Utente
t
w(WAKE-INT)
t
d(WAKE-STBY)
t
d(IDLE−XCOH)
32 SYSCLKOUT Cycles
Wake−up
Signal
X1/XCLKIN
XCLKOUT
†
STANDBY
Normal Execution
STANDBY
Flushing Pipeline
A
B
C
D
E
F
Device
Status
NOTES: A. IDLE instruction is executed to put the device into STANDBY mode.
B. The PLL block responds to the STANDBY signal. SYSCLKOUT is held for approximately 32 cycles before being turned
off. This 32-cycle delay enables the CPU pipe and any other pending operations to flush properly.
C. The device is now in STANDBY mode.
D. The external wake-up signal is driven active (negative edge triggered shown as an example).
D. The external wake-up signal is driven active (negative edge triggered shown as an example).
E. After a latency period, the STANDBY mode is exited.
F. Normal operation resumes. The device responds to the interrupt (if enabled).
SGUS062A – JUNE 2009 – REVISED APRIL 2010
www.ti.com
Figure 6-14. STANDBY Entry and Exit Timing
102
Electrical Specifications
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