SiRFatlasV
Hardware Design Guide
January, 2010
SiRF Design Guide
– Proprietary and Confidential
11
Figure 5: SD0 Power Circuit
NOTE
–
An alternative way for quick discharging is to use an IC (such as AAT4280IGU-3-T1) instead of
the circuit shown above.
PCB Layout
Route all signals with equal length.
LCD
Add an EMI filter to all nets.
PCB Layout
All nets should be routed as equal length.
C
RYSTAL
The following figures are recommended circuits for the external crystal clock input.
Figure 6: 24MHz Crystal Circuit