NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 10

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• Applications: Network Processor
• Core Processor: ARM7
• Program Memory Type: External Program Memory
• Controller Series: -
• Ram Size: External
• Interface: EBI/EMI, Ethernet, DMA, SPI, UART
• Number Of I /o: 16
• Voltage - Supply: 1.4 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 177-LFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Each pinout table applies to a specific interface and contains the following information:
Notes:
System Bus interface
6
Pinout detail tables
Signal
Pin
_
I/O
OD
BCLK
External bus
ADDR27
ADDR26
External bus
ADDR25
ADDR24
ADDR23
ADDR22
ADDR21
P i n o u t d e t a i l t a b l e s
Symbol
NO CONNECT
The 177th pin (package ball) is for alignment of the package on the PCB.
The pin name for each I/O signal. Some signals have multiple function modes and are identified
accordingly. The mode is configured through firmware using one or more configuration registers.
The pin number assignment for a specific I/O signal.
See Figure 5, "Internal pullup characteristics," on page 24 and Figure 6, "Internal pulldown
characteristics," on page 25 for an illustration of the characteristics of these pins. Use the figures
to select the appropriate value of the complimentary resistor to drive the signal to the opposite
logic state. For those pins with no pullup or pulldown resistor, you must select the appropriate
value per your design requirements.
An underscore (bar) indicates that the pin is active low.
The type of signal — input, output, or input/output.
The output drive strength of an output buffer. The NS7520 uses one of three drivers:
Other
CS0OE_
CS0WE_
as a pin description means do not connect to this pin.
U next to the pin number indicates that the pin is a pullup resistor.
D next to the pin number indicates that the pin is a pulldown resistor.
No value next to the pin indicates that the pin has neither a pullup nor pulldown resistor.
2 mA
4 mA
8 mA
N S 7 5 2 0 D a t a s h e e t
A6
N10 U
P10 U
M10 U
R10 U
N9 U
R9 U
M9 U
Pin
0
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
8
4
4
4
4
4
4
4
OD
0 3 / 2 0 0 6
Synchronous bus clock
External bus
Addr bit 27
Addr bit 26
External bus
Remainder of address bus (through ADDR0)
Description
Other
Logical AND of CS0_ and OE_
Logical AND of CS_ and WE_