NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 222
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NS7520B-1-I46
Manufacturer Part Number
NS7520B-1-I46
Description
IC ARM MICROPROCESSOR 177BGA
Manufacturer
Digi International
Series
NET+ARM®r
Specifications of NS7520B-1-I46
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-I46
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-I46
Manufacturer:
NETARM
Quantity:
20 000
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S e r i a l p r o t o c o l s
Serial protocols
UART mode
You can configure the bit-rate generator to use the external oscillator, the external
clock input, or internal system timing as its timing reference. This allows for a wider
range of possible bit-rates. See "Serial Channel 1, 2 Bit-Rate registers" on page 241
for more information.
The serial port provides support for these protocols:
Many applications require a simple mechanism for sending low-speed information
between two pieces of equipment. The universal asynchronous receiver transmitter
(UART) protocol is the de facto standard for simple serial communications.
The UART receiver uses an over-sampling technique to find the bit-level framing of
the UART protocol. The framing protocol is as follows:
Because the transmitter and receiver operate asynchronously, the transmit and
receive clocks between them do not need to be connected. Instead, the receiver
over-samples the receive data stream by a factor of 8, 16, or 32. A byte of data is
preceded by a high-to-low transition at the beginning of the start bit. The receiver
continuously samples the data stream to determine the center of each bit-time.
When the UART is not transmitting data, it transmits a continuous stream of ones —
considered the idle condition. When data transmission begins again, the transmitter
sends the start bit and the receiver is enabled.
You can configure the UART to perform the following functions:
UART (Universal Asynchronous Receiver Transmitter)
SPI
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
Start bit:
Data:
Parity:
Code:
1 or more
0
5, 6, 7, or 8 bits
Odd, even, or no parity
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