參數資料
型號: TMS320F2809_07
廠商: Texas Instruments, Inc.
元件分類: 數字信號處理
英文描述: Digital Signal Processors
中文描述: 數字信號處理器
文件頁數: 111/140頁
文件大?。?/td> 1108K
代理商: TMS320F2809_07
www.ti.com
t
w(WAKE-INT)
t
d(WAKE-STBY)
t
d(IDLEXCOL)
Wakeup
Signal
X1/X2 or
X1 or
XCLKIN
XCLKOUT
STANDBY
Normal Execution
STANDBY
Flushing Pipeline
(A)
(B)
(C)
(D)
(E)
(F)
Device
Status
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801
TMS320C2802, TMS320C2801, and TMS320F2801x DSPs
SPRS230J–OCTOBER 2003–REVISED SEPTEMBER 2007
Table 6-19. STANDBY Mode Switching Characteristics
PARAMETER
Delay time, IDLE instruction
executed to XCLKOUT low
Delay time, external wake signal
to program execution resume
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t
d(IDLE-XCOL)
32t
c(SCO)
45t
c(SCO)
cycles
cycles
Without input qualifier
100t
c(SCO)
Wake up from flash
Flash module in active
state
cycles
With input qualifier
100t
c(SCO)
+ t
w(WAKE-INT)
t
d(WAKE-STBY)
Without input qualifier
1125t
c(SCO)
Wake up from flash
Flash module in sleep
state
cycles
With input qualifier
1125t
c(SCO)
+ t
w(WAKE-INT)
Without input qualifier
With input qualifier
100t
c(SCO)
cycles
Wake up from SARAM
100t
c(SCO)
+ t
w(WAKE-INT)
(1)
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.
B.
IDLE instruction is executed to put the device into STANDBY mode.
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.
Clock to the peripherals are turned off. However, the PLL and watchdog are not shut down. The device is now in
STANDBY mode.
The external wake-up signal is driven active.
After a latency period, the STANDBY mode is exited.
Normal execution resumes. The device will respond to the interrupt (if enabled).
C.
D.
E.
F.
Figure 6-13. STANDBY Entry and Exit Timing Diagram
Table 6-20. HALT Mode Timing Requirements
MIN
NOM
MAX
UNIT
cycles
cycles
t
w(WAKE-GPIO)
t
w(WAKE-XRS)
Pulse duration, GPIO wake-up signal
Pulse duration, XRS wakeup signal
t
oscst
+ 2t
c(OSCCLK)(1)
t
oscst
+ 8t
c(OSCCLK)
(1)
See
Table 6-13
for an explanation of t
oscst
.
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Electrical Specifications
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