Texas Instruments 180 to 100 Pin DIMM Adapter TMDSADAP180TO100 TMDSADAP180TO100 Datenbogen
Produktcode
TMDSADAP180TO100
t
h(boot-mode)
(A)
t
w(RSL2)
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)
SPRS825C – OCTOBER 2012 – REVISED FEBRUARY 2014
Table 6-13. Reset (XRS) Timing Requirements
MIN
MAX
UNIT
t
h(boot-mode)
Hold time for boot-mode pins
14000t
c(M3C)
cycles
t
w(RSL2)
Pulse duration, XRS low on warm reset
32t
c(OCK)
cycles
Table 6-14. 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
μs
t
w(WDRS)
Pulse duration, reset pulse generated by watchdog
512t
c(OCK)
cycles
t
d(EX)
Delay time, address/data valid after XRS high
32t
c(OCK)
cycles
t
INTOSCST
Start up time, internal zero-pin oscillator
3
μs
t
OSCST
(1)
On-chip crystal-oscillator start-up time
1
10
ms
(1)
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 M3SSCLK speed. The M3SSCLK 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 M3SSCLK speed. The M3SSCLK will
be based on user environment and could be with or without PLL enabled.
Figure 6-3. Warm Reset
136
Electrical Specifications
Copyright © 2012–2014, Texas Instruments Incorporated
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