NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 88

• 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

7 6
G E N m o d u l e r e g i s t e r s
Table 30: PORTA configuration
Inputs
An input that provides one or more input signals to different blocks in the chip is
always connected to those blocks. The target block must be configured to use the
input; similarly, those blocks that should not use the input must be configured not to
use it.
Outputs
Configuring a pin for an output function also enables the tri-state driver for that pin.
There should be no external driver on a pin configured for output.
READBACK
When reading the ADATA field, the data read depends on how the pin is configured:
PORTA4
When PORTA4 is configured with
Channel A determines the function
PORTA2
The memory module configures the AMUX output signal. The AMUX configuration
overrides the AMODE, ADIR, and ADATA fields.
PORTA0
When PORTA0 is configured with
Channel A determines the function
PORTA1
PORTA0
PORTA
bit
Configured as GPIO output. Reads data from the register whose data drives
the pin. This can, for example, mask a short circuit on the output pin.
All other configurations. Reads the state of the pin.
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
GPIO IN
GPIO IN
AMODE=0
ADIR=0
GPIO OUT
GPIO OUT
ADIR=1
AMODE[4]=1:ADIR[4]=1
AMODE[0]=1:ADIR[0]=1
SER1_SPI_M_CLK_OUT, SER1_OUT1, SER1_RXC_OUT
SER1_SPI_M_ENABLE_A_ OUT
SER1_CTS
SER1_SPI_S_ENABLE_
IN/SER1_DCD_/
DONE1_IN_/
SER1_TXC IN
AMODE=1
ADIR=0
, the configuration of Serial
, the configuration of Serial
or
SER1_OUT2
DONE1_OUT_
SER1_SPI_M_ENABLE_
OUT/SER1_OUT2
ADIR=1
.
.