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参数资料
型号： TMS320C2812ZHHS
厂商： TEXAS INSTRUMENTS INC
元件分类： 数字信号处理
英文描述： 16-BIT, 150 MHz, OTHER DSP, PBGA179
封装： LEAD FREE, BGA-179
文件页数： 12/156页
文件大小： 1826K
代理商： TMS320C2812ZHHS
Electrical Specifications
109
April 2001 Revised October 2005
SPRS174M
Table 613. STANDBY Mode Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
td(IDLE-XCOH)
Delay time, IDLE instruction
executed to XCLKOUT high
32tc(SCO)
45tc(SCO) Cycles
Delay time, external wake
signal to program execution
resume
Wake-up from Flash
Flash module in active
state
Without input
qualifier
12tc(CI) Cycles
td(WAKE-STBY)
Wake-up from Flash
Flash module in active
state
With input qualifier
12tc(CI) + tw(WAKE-INT) Cycles
td(WAKE-STBY)
Wake-up from Flash
Flash module in sleep state
Without input
qualifier
1125tc(SCO) Cycles
Wake-up from Flash
Flash module in sleep state
With input qualifier
1125tc(SCO) + tw(WAKE-INT) Cycles
Wake-up from SARAM
Without input
qualifier
12tc(CI) Cycles
Wake-up from SARAM
With input qualifier
12 tc(CI) + tw(WAKE-INT) Cycles
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.
tw(WAKE-INT)
td(WAKE-STBY)
td(IDLEXCOH)
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. Clocks to the peripherals are turned off. However, the PLL and watchdog are not shut down. The device is now in
STANDBY mode.
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 will respond to the interrupt (if enabled).
Figure 615. STANDBY Entry and Exit Timing
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