TransDimension Inc.
Interfacing TD242LP to Intel StrongArm SA1110 Processor
Contents
1.
Introduction..........................................................................................................................1
1.1
System Overview .....................................................................................................1
1.2
Packaging and Pin Assignments ..............................................................................2
1.3
References................................................................................................................4
1.4
Notation....................................................................................................................4
1.5
Software ...................................................................................................................4
Bus Interface ........................................................................................................................5
2.1
Recommendations....................................................................................................5
2.2
Hardware Design .....................................................................................................5
Operating Mode:
TEST...........................................................................................5
TD242LP Voltage Regulator:
ENVREG.................................................................5
Bus Control:
/CS, /RD,
and
/WR.............................................................................6
Address Bus:
A
12
:A
1
.................................................................................................6
Data Bus:
D
15
:D
0
.....................................................................................................6
Hardware Reset:
/RESET
.......................................................................................6
Interrupt:
INT..........................................................................................................6
Crystal Oscillator and PLL:
OSC
1
and
OSC
2
.........................................................6
Alternative clock input for the BGA64.....................................................................7
Alternative clock input for the LQFP64...................................................................8
2.3
Software Configuration............................................................................................8
Bus Cycle Timing .....................................................................................................8
SA1110 Chip Select Programming ..........................................................................9
Software Controlled TD242LP Reset.....................................................................10
Interrupt: SA1110 Configuration...........................................................................10
Interrupt: TD242LP Configuration .......................................................................11
USB System Initialization ......................................................................................11
2.4
TD242LP Access ...................................................................................................12
TD242LP Memory Map .........................................................................................12
USB Port Circuits ..............................................................................................................12
3.1
TD242LP Port 2.....................................................................................................12
USB Signal Lines ...................................................................................................13
USB Host Power Distribution................................................................................13
3.2
TD242LP Port 1.....................................................................................................13
USB Signal Lines ...................................................................................................13
USB Host Power Distribution................................................................................13
Software Considerations........................................................................................14
Power and Ground .............................................................................................................14
I/O Voltage.............................................................................................................14
Core Voltage ..........................................................................................................14
3.3V Supply ............................................................................................................14
Ground ...................................................................................................................14
Reference Design Schematics............................................................................................14
2.
3.
4.
5.
TransDimension, Inc.
iii
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