atr0621 ATMEL Corporation, atr0621 Datasheet - Page 16

• Manufacturer Part Number: atr0621
• Description: Gps Baseband Processor - Atmel Corporation
• Manufacturer: ATMEL Corporation

Table 3-15.
16
Pin Name
P19/SIGLO2/GPSMODE6
P20/SCK2/TIMEPULSE
P21/TXD2
P22/RXD2
P23/SCK/GPSMODE7
P24/MOSI/GPSMODE8
P25/MISO/GPSMODE9
P26/NSS/NPCS0/
GPSMODE10
P27/NPCS1/GPSMODE11
P28/EM_A20/NPCS2
P29/NPCS3/GPSMODE12
P30/AGCOUT0
P31/RXD1
EM_DA0 to EM_DA15
Note:
“Never leave open” means: This pin needs a defined level, even if VDD18 is not supplied and system is in backup mode.
ATR0621 [Preliminary]
Recommended Pin Connection (Continued)
Recommended External Circuit
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Output in default ROM firmware: leave open; only needs pull-up resistor to VDD18 or pull-down resistor
to GND if used as GPIO input by user application and not always driven from external sources.
Output in default ROM firmware: leave open; only needs pull-up resistor to VDD18 or pull-down resistor
to GND if used as GPIO input by user application and not always driven from external sources.
Pull-up resistor to VDD18 or connect to VDD18 if unused. Pull-down resistor also possible if used as
GPIO input by user application. Never leave open.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
open.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Output in default ROM firmware: leave open; only needs pull-up resistor to VDD18 or pull-down resistor
to GND if used as GPIO input by user application and not always driven from external sources.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application; connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in
GPSMODE0 to GPSMODE12” on page
configured as output by user application.
Internal pull-up resistor, leave open.
Pull-up resistor to VDD18 or connect to VDD18 if unused. Pull-down resistor also possible if used as
GPIO input by user application. Never leave open.
If no external memory is used, can be left open (internal pull-down). If an external memory is connected
to these pins, a defined level is needed when all external memories are inactive.
10. Can be left open if not used as GPSMODE pin and
10. Can be left open if not used as GPSMODE pin and
10. Can be left open if not used as GPSMODE pin and
10. Can be left open if not used as GPSMODE pin and
10. Use pull-up resistor to VDD18, if SPI is used. Never leave
10. Can be left open if not used as GPSMODE pin and
10. Can be left open if not used as GPSMODE pin and
“Setting
“Setting
“Setting
“Setting
“Setting
“Setting
“Setting
4890AS–GPS–09/05