ZHCS898O October 2003 – March 2019 TMS320F2801 , TMS320F28015 , TMS320F28016 , TMS320F2802 , TMS320F2806 , TMS320F2808 , TMS320F2809
PRODUCTION DATA.
请参考 PDF 数据表获取器件具体的封装图。
The low-power modes on the 280x are similar to the 240x devices. Table 6-34 summarizes the various modes.
MODE | LPMCR0(1:0) | OSCCLK | CLKIN | SYSCLKOUT | EXIT(1) |
---|---|---|---|---|---|
IDLE | 00 | On | On | On(2) | XRS, Watchdog interrupt, any enabled interrupt, XNMI |
STANDBY | 01 | On
(watchdog still running) |
Off | Off | XRS, Watchdog interrupt, GPIO Port A signal, debugger(3), XNMI |
HALT | 1X | Off
(oscillator and PLL turned off, watchdog not functional) |
Off | Off | XRS, GPIO Port A signal, XNMI, debugger(3) |
The various low-power modes operate as follows:
IDLE Mode: | This mode is exited by any enabled interrupt or an XNMI that is recognized by the processor. The LPM block performs no tasks during this mode as long as the LPMCR0(LPM) bits are set to 0,0. | |
STANDBY Mode: | Any GPIO port A signal (GPIO[31:0]) can wake the device from STANDBY mode. The user must select which signal(s) will wake the device in the GPIOLPMSEL register. The selected signal(s) are also qualified by the OSCCLK before waking the device. The number of OSCCLKs is specified in the LPMCR0 register. | |
HALT Mode: | Only the XRS and any GPIO port A signal (GPIO[31:0]) can wake the device from HALT mode. The user selects the signal in the GPIOLPMSEL register. |
NOTE
The low-power modes do not affect the state of the output pins (PWM pins included). They will be in whatever state the code left them in when the IDLE instruction was executed. See the TMS320x280x, 2801x, 2804x DSP system control and interrupts reference guide for more details.