參數(shù)資料
型號: NS7520B-1-C55
廠商: Digi International
文件頁數(shù): 2/68頁
文件大?。?/td> 0K
描述: IC ARM MICROPROCESSOR 177BGA
標準包裝: 160
系列: NET+ARM®
應用: 網(wǎng)絡處理器
核心處理器: ARM7
程序存儲器類型: 外部程序存儲器
RAM 容量: 外部
接口: EBI/EMI,以太網(wǎng),DMA,SPI,UART
輸入/輸出數(shù): 16
電源電壓: 1.4 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 177-LFBGA
包裝: 托盤
供應商設備封裝: 177-BGA(13x13)
P i no ut d e tail tabl es
6
NS 75 20 Da ta shee t
03 /2 00 6
Pinout detail tables
Each pinout table applies to a specific interface and contains the following information:
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
Signal
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.
Pin
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.
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.
I/O
The type of signal — input, output, or input/output.
OD
The output drive strength of an output buffer. The NS7520 uses one of three drivers:
2 mA
4 mA
8 mA
Symbol
Pin
I/O
OD
Description
BCLK
A6
0
8
Synchronous bus clock
External bus
Other
External bus
Other
ADDR27
CS0OE_
N10 U
I/O
4
Addr bit 27
Logical AND of CS0_ and OE_
ADDR26
CS0WE_
P10 U
I/O
4
Addr bit 26
Logical AND of CS_ and WE_
External bus
ADDR25
M10 U
I/O
4
Remainder of address bus (through ADDR0)
ADDR24
R10 U
I/O
4
ADDR23
N9 U
I/O
4
ADDR22
R9 U
I/O
4
ADDR21
M9 U
I/O
4
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NS7520B-1-I46 IC ARM MICROPROCESSOR 177BGA
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