t
h(boot-mode)
(A)
t
w(RSL2)
INTOSC1
X1/X2
XRS
Boot-Mode
Pins
XCLKOUT
I/O Pins
Address/Data/
Control
(Internal)
Boot-ROM Execution Starts
User-Code Execution Starts
User-Code Dependent
User-Code Execution Phase
User-Code Dependent
User-Code Execution
Peripheral/GPIO Function
User-Code Dependent
GPIO Pins as Input (State Depends on Internal PU/PD)
GPIO Pins as Input
Peripheral/GPIO Function
t
d(EX)
30
TMS320F28069, TMS320F28068, TMS320F28067, TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
SPRS698F – NOVEMBER 2010 – REVISED MARCH 2016
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TMS320F28069 TMS320F28068 TMS320F28067 TMS320F28066 TMS320F28065
TMS320F28064 TMS320F28063 TMS320F28062
Specifications
Copyright © 2010–2016, Texas Instruments Incorporated
Table 5-3. Reset (XRS) Timing Requirements
MIN
MAX
UNIT
t
h(boot-mode)
Hold time for boot-mode pins
1000t
c(SCO)
cycles
t
w(RSL2)
Pulse duration, XRS low on warm reset
32t
c(OSCCLK)
cycles
(1)
Dependent on crystal/resonator and board design.
Table 5-4. Reset (XRS) Switching Characteristics
over recommended operating conditions (unless otherwise noted)
PARAMETER
MIN
TYP
MAX
UNIT
t
w(RSL1)
Pulse duration, XRS driven by device
600
μ
s
t
w(WDRS)
Pulse duration, reset pulse generated by watchdog
512t
c(OSCCLK)
cycles
t
d(EX)
Delay time, address/data valid after XRS high
32t
c(OSCCLK)
cycles
t
INTOSCST
Start up time, internal zero-pin oscillator
3
μ
s
t
OSCST
(1)
On-chip crystal-oscillator start-up time
1
10
ms
A.
After reset, the Boot ROM code samples BOOT Mode pins. Based on the status of the Boot Mode pin, the boot code
branches to destination memory or boot code function. If Boot ROM code executes after power-on conditions (in
debugger environment), the Boot code execution time is based on the current SYSCLKOUT speed. The
SYSCLKOUT will be based on user environment and could be with or without PLL enabled.
Figure 5-6. Warm Reset