ATR0621P_08 Datasheet, PDF (19/31 Pages) ATMEL Corporation – GPS Baseband GPS Baseband

ATR0621P
3.4.1
Connecting an Optional FLASH Memory
The ATR0621P offers the possibility to connect an external FLASH memory. The high perfor-
mance ARM7^™ 32-bit RISC processor of the ATR0621P can be used to run application specific
code, that is stored in the FLASH memory. The 32-bit RISC processor of the ATR0621 accesses
the external memory via the EBI (External Bus Interface). Atmel recommends to use 1.8V
FLASH memory, e.g. the Atmel AT49SV802A. The LDO_OUT pin of the ATR0621P can supply
the external FLASH memory. Figure 3-3 shows an example of the external FLASH memory
connection.
Figure 3-3. Example of an External FLASH Memory Connection
AT49SV802A
I/O0-15
A0-18
CE_N
WE_N
OE_N
BYTE_N
READY/BUSY_N
NC
EM_DA0-15
EM_A1-19
P4/NCS0
P5/NWE
P6/NOE
ATR0621P
RESET_N
NRESET
NC
VSS
GND
+3V
(see Power Supply)
NC
GND
GND
NC: Not connected
GND
NSHDN
LDO_EN
LDO_OUT
VDD18
LDO_IN
LDOBAT_IN
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4890H–GPS–08/08