NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 237

• 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

Table 85: Serial Channel Control Register A
D22
D21
D20
D19:18
D17
Bits
R/W
R/W
R/W
R/W
R/W
Access
RTSRX
RL
LL
OUT1/OUT2
DTR
Mnemonic
0
0
0
0
0
Reset
Enable active RTS (only when RX FIFO has space)
Supports hardware handshaking. When RTSRX is set,
the RTS output provides the receiver FIFO almost-full
condition. When the receiver FIFO backs up, the RTS
signal is dropped. The RTS output stalls an external
transmitter from delivering data.
Remote loopback
Provides a remote loopback feature. When set to 1, the
TXD transmit output is connected to the RXD receive
input. The RL field immediately echoes receive data
back as transmit data.
Primarily used as test vehicle for external data
equipment.
Local loopback
Provides an internal local loopback feature. When set
to 1, the internal receive data stream is connected to
the TXD output signal. This field connects the serial
channel receiver directly to the serial channel
transmitter.
Primarily used as a test vehicle for the serial channel
driver firmware.
General-purpose output 1/General-purpose
output 2
The OUT1 and OUT2 fields provide extra,
miscellaneous serial channel control signal outputs.
The OUT1 and OUT2 signals can be routed through
PORTA and PORTC pins using PORTA and PORTC
special function modes.
Data terminal ready active
Controls the state of the external data terminal ready
signal.
Description
w w w . d i g i e m b e d d e d . c o m
active.
inactive.
Setting DTR to 1 causes the DTR output to go
Setting DTR to 0 causes the DTR output to go
S e r i a l C o n t r o l l e r M o d u l e
2 2 5