NS9210B-0-I75 Datasheet, PDF (10/68 Pages) List of Unclassifed Manufacturers – Figure 1 shows the NS7520 modules. Dashed lines indicate shared pins

Pinout detail tables
Pinout detail tables
Each pinout table applies to a specific interface and contains the following information:
Signal
Pin
_
I/O
OD
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.
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.
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:
2 mA
4 mA
8 mA
Notes:
NO CONNECT as a pin description means do not connect to this pin.
The 177th pin (package ball) is for alignment of the package on the PCB.
System Bus interface
Symbol
BCLK
External bus Other
ADDR27
CS0OE_
ADDR26
CS0WE_
External bus
ADDR25
ADDR24
ADDR23
ADDR22
ADDR21
Pin
I/O OD Description
A6
0
8
Synchronous bus clock
External bus Other
N10 U I/O
4
Addr bit 27 Logical AND of CS0_ and OE_
P10 U I/O
4
Addr bit 26
External bus
Logical AND of CS_ and WE_
M10 U I/O
4
Remainder of address bus (through ADDR0)
R10 U I/O
4
N9 U I/O
4
R9 U I/O
4
M9 U I/O
4
6
NS7520 Datasheet 03/2006