atr0621 ATMEL Corporation, atr0621 Datasheet - Page 15

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

Table 3-15.
4890AS–GPS–09/05
Pin Name
P0/NANTSHORT
P1/GPSMODE0
P2/BOOT_MODE
P3/NCS1
P4/NCS0
P5/NWE/NWR0
P6/NOE/NRD
P7/NUB/NWR1
P8/STATUSLED
P9/EXTINT0
P10/EM_A0/NLB
P11/EM_A21
P12/NCS2/GPSMODE2
NCS3
P15/ANTON
P16/NWD_OVF
P17/SCK1/GPSMODE5
P18/TXD1
Note:
P13/EXTINT1/GPSMODE3/
P14/SCK0/GPSMODE4
“Never leave open” means: This pin needs a defined level, even if VDD18 is not supplied and system is in backup mode.
Recommended Pin Connection
Recommended External Circuit
Internal pull-down resistor; can be left 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
this pin is left open, the GPSMODE pin configuration feature must be completely disabled by user
application.
Internal pull-down resistor, leave open.
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.
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.
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 pull-down resistor to GND or connect to GND or VDD18 if unused. Never
leave open.
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 (this pin is used as address line EM_A21 by
standard firmware, do not connect to GND or VDD18 directly). Never leave open.
Pull-up resistor to VDD18 or pull-down resistor to GND if used as input by user application, or 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, or connect to
GND or VDD18 if unused or used as GPSMODE pin only. See GPSMODE definitions in section
GPSMODE0 to GPSMODE12” on page
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-down resistor; can be left open.
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.
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.
10. Can be left open if configured as output by user application. If
10. Can be left open if not used as GPSMODE pin and
10. Never leave open.
10. Can be left open if not used as GPSMODE pin and
10. Can be left open if not used as GPSMODE pin and
ATR0621 [Preliminary]
“Setting
“Setting
“Setting
“Setting
“Setting
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