adsp-bf548 Analog Devices, Inc., adsp-bf548 Datasheet - Page 32

• Manufacturer Part Number: adsp-bf548
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
Table 12. Pin Descriptions (Continued)
Pin Name
DDR1 Memory Interface
DA0–12
DBA0–1
DQ0–15
DQS0–1
DQM0–1
DCLK0–1
DCLK0–1
DCS0–1
DCLKE
DRAS
DCAS
DWE
DDR_VREF
DDR_VSSR
Asynchronous Memory Interface
A1-3
D0-15/ND_D0-15/ATAPI_D0-15
AMS0–3
ABE0 /ND_CLE
ABE1/ND_ALE
AOE/NR_ADV
ARE
AWE
ATAPI Controller Pins
ATAPI_PDIAG
High Speed USB OTG Pins
USB_DP
USB_DM
USB_XI
USB_XO
USB_ID
USB_VBUS
USB_VREF
USB_RSET
MXVR (MOST) Interface
MFS
MLF_P
MLF_M
MXI
MXO
9
10
Rev. A | Page 32 of 88 | October 2008
I/O
O
O
I/O DDR1 Data Bus
I/O DDR1 Data Strobe
O
O
O
O
O
O
O
O
I
I
O
I/O Data Bus for Async, NAND and ATAPI Accesses
O
O
O
O
O
O
I
I/O USB D+ Pin (Pull low when unused.)
I/O USB D- Pin (Pull low when unused.)
C
C
I
I/O USB VBUS Pin (Pull high when unused.)
A
A
O
A
A
C
C
1
Function (First/Second/Third/Fourth)
DDR1 Address Bus
DDR1 Bank Active Strobe
DDR1 Data Mask for Reads and Writes
DDR1 Output Clock
DDR1 Complementary Output Clock
DDR1 Chip Selects
DDR1 Clock Enable
DDR1 Row Address Strobe
DDR1 Column Address Strobe
DDR1 Write Enable
DDR1 Voltage Reference
DDR1 Voltage Reference Shield (Must be connected to GND.)
Address Bus for Async and ATAPI Addresses
Bank Selects (Pull high with a resistor when used as chip select.)
Byte Enables:Data Masks for Asynchronous Access/NAND Command
Latch Enable
Byte Enables:Data Masks for Asynchronous Access/NAND Address Latch
Enable
Output Enable/NOR Address Data Valid
Read Enable/NOR Output Enable
Write Enable
Determines if an 80-pin cable is connected to the host.
Clock XTAL Input (Pull high or low when unused.)
Clock XTAL Output (Leave unconnected when unused.)
USB OTG ID Pin (Pull high when unused.)
USB Voltage Reference (Connect to GND through a 0.1 mF capacitor or
leave unconnected when not used.)
USB Resistance Set (Connect to GND through an unpopulated
resistor pad.)
MXVR Frame Sync (Leave unconnected when unused.)
MXVR Loop Filter Plus (Leave unconnected when unused.)
MXVR Loop Filter Minus (Leave unconnected when unused.)
MXVR Crystal Input (Pull high or low when unused.)
MXVR Crystal Output (Pull high or low when unused.)
Driver
Type
D
D
D
D
D
D
D
D
D
D
D
D
A
A
A
A
A
A
A
A
C
2