NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 33

• 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

“No connect” pins
General-purpose I/O
Table 8: “No connect” pins
Note:
Table 9: GPIO pinout
R13
P12
N12
R15
M11
P11
N11
R12
R14
P13
PORTA7
PORTA6
PORTA5
Pin
GPIO
signal
If your design implements 10–20K ohm pullups instead of pulldowns on
R13 and P12, and a pullup on N12 instead of GND, no action is required.
TXDA
DTRA_
RTSA_
Serial
signal
Add a 15K ohm pulldown to GND (15K ohm is the recommended value; 10–
XTALB2: NO CONNECT
Add a 15K ohm pulldown to GND (15K ohm is the recommended value; 10–
20K ohms is acceptable)
20K ohms is acceptable)
Tie to GND
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
Description
DREQ1_
Other
signal
J14 U
J13 U
J15 U
Pin
I/O
I/O
I/O
I/O
w w w . d i g i e m b e d d e d . c o m
2
2
2
OD
Channel 1 TXD
Channel 1 DTR_
Channel 1 RTS_
Serial channel
description
P i n o u t a n d P a c k a g i n g
DMA channel 3/5
Req
Other
description
2 1