TMS320F2810 Datasheet, PDF (111/172 Pages) Texas Instruments – Digital Signal Processors

TMS320F2810, TMS320F2811, TMS320F2812
TMS320C2810, TMS320C2811, TMS320C2812
www.ti.com
SPRS174T – APRIL 2001 – REVISED MAY 2012
t_w(WAKE-XNMI)
t_w(WAKE-XRS)
Table 6-16. HALT Mode Timing Requirements
Pulse duration, XNMI wakeup signal
Pulse duration, XRS wakeup signal
MIN
2t_c(CI)
8t_c(CI)
NOM
MAX
UNIT
cycles
cycles
t_d(IDLE-XCOH)
t_p
t_d(WAKE)
Table 6-17. HALT Mode Switching Characteristics
PARAMETER
Delay time, IDLE instruction executed to XCLKOUT high
PLL lock-up time
Delay time, PLL lock to program execution resume
• Wake up from flash
– Flash module in sleep state
• Wake up from SARAM
MIN
32t_c(SCO)
TYP
45t_c(SCO)
MAX
131072t_c(CI)
UNIT
cycles
cycles
1125t_c(SCO)
35t_c(SCO)
cycles
cycles
Device
Status
A
B
Flushing Pipeline
C
E
D
HALT
HALT
PLL Lock-up Time
Wake-up Latency
G
F
Normal
Execution
XNMI
t_w(WAKE-XNMI)
t_p
t_d(wake)
X1/XCLKIN
(H)
XCLKOUT
t_d(IDLE-XCOH)
Oscillator Start-up Time
32 SYSCLKOUT Cycles
A. IDLE instruction is executed to put the device into HALT mode.
B. The PLL block responds to the HALT signal. SYSCLKOUT is held for another 32 cycles before the oscillator is turned
off and the CLKIN to the core is stopped. This 32-cycle delay enables the CPU pipe and any other pending
operations to flush properly.
C. Clocks to the peripherals are turned off and the internal oscillator and PLL are shut down. The device is now in HALT
mode and consumes absolute minimum power.
D. When XNMI is driven active, the oscillator is turned on; but the PLL is not activated. The pulse duration of 2t_c(CI) is
applicable when an external oscillator is used. If the internal oscillator is used, the oscillator wake-up time should be
added to this parameter.
E. When XNMI is deactivated, it initiates the PLL lock sequence, which takes 131,072 X1/XCLKIN cycles.
F. When CLKIN to the core is enabled, the device will respond to the interrupt (if enabled), after a latency. The HALT
mode is now exited.
G. Normal operation resumes.
H. XCLKOUT = SYSCLKOUT
Figure 6-17. HALT Wakeup Using XNMI
Copyright © 2001–2012, Texas Instruments Incorporated
Electrical Specifications 111
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