3.4
External Connections for a Working GPS System
Example of an External Connection
SIGH
SIGL
SC
PURF
PUXTO
NC
SIGHI
SIGLO
CLK23
RF_ON
NSLEEP
NRESET
Figure 3-2.
ATR0601
ATR0622
P8
P20
USB_DM
USB_DP
STATUS LED
TIMEPULSE
Optional
USB
Optional
USART 1
Optional
USART 2
see Table 3-15
see Table 3-15
see Table 3-15
see Table 3-15
see Table 3-15
see Table 3-15
NC
NC
NC
NC
NC
NC
GND
+3V
(see Power Supply)
P0 - 2
P9
P12 - 17
P19
P23 - 27
P29 - 30
TMS
TCK
TDI
NTRST
TDO
DBG_EN
GND
NSHDN
LDO_EN
LDO_OUT
VDD18
LDO_IN
LDOBAT_IN
VBAT18
VBAT
P31
P18
P22
P21
XT_IN
XT_OUT
32.368 kHz
(see RTC)
+3V
(see Power Supply)
VDDIO
+3V
(see Power Supply)
VDD_USB
+3V
(see Power Supply)
GND
NC: Not connected
14
ATR0622 [Preliminary]
4891CS鈥揋PS鈥?1/06