Texas Instruments Delfino C28346 DIM168 ControlCARD TMDSCNCD28346-168 TMDSCNCD28346-168 데이터 시트
제품 코드
TMDSCNCD28346-168
t
h(boot-mode)
(A)
t
w(RSL2)
XCLKIN
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
(Don’t Care)
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)
OSCCLK * 5
OSCCLK/8
SPRS516D – MARCH 2009 – REVISED AUGUST 2012
Table 6-10. Reset (XRS) Timing Requirements
MIN
NOM
MAX
UNIT
t
w(RSL1)
(1)
Pulse duration, stable input clock to XRS high
64t
c(OSCCLK)
cycles
t
w(RSL2)
Pulse duration, XRS low
Warm reset
64t
c(OSCCLK)
cycles
Pulse duration, reset pulse generated by
t
w(WDRS)
512t
c(OSCCLK)
cycles
watchdog
t
d(EX)
Delay time, address/data valid after XRS high
32t
c(OSCCLK)
cycles
t
OSCST
(2)
Oscillator start-up time
1
10
ms
t
h(boot-mode)
Hold time for boot-mode pins
200t
c(OSCCLK)
cycles
t
pup
Power-up time
5
ms
(1)
In addition to the t
w(RSL1)
requirement, XRS has to be low until V
DD
has reached the minimum operating voltage.
(2)
Dependent on crystal/resonator and board design.
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.
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 6-6. Warm Reset
Copyright © 2009–2012, Texas Instruments Incorporated
Electrical Specifications
121
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