Digi NS7520B-1-C36 Hardware Reference Manual page 91

PORTC
bit
CMODE=0
CDIR=0
PORTC0 GPIO IN
PORTC
bit
CMODE=0
CDIR=0
PORTC7
PORTC6
PORTC5
PORTC4
PORTC3
PORTC2
PORTC1
PORTC0 DONE2_IN_
Table 32: PORTC 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.
CSF=0
CMODE=1
CDIR=1 CDIR=0
GPIO OUT
CSF=1
CMODE=1
CDIR=1 CDIR=0
DREQ2_IN
REJECT_
SER2_SPI_S_CLK IN/
SER2_RXC IN
SER2_RXD
SER2_DSR_
SER2_CTS_
SER2_SPI_S_ENABLE_
IN/SER2_DCD_/
SER2_TXC IN
w w w . d i g i e m b e d d e d . c o m
G E N M o d u l e
CDIR=1
LEVELIRQ0=CDIR0
CDIR=1
SER2_TXD
SER2_DTR_
SER2_RTS_
SER2_SPI_M_CLK
OUT/SER2_TXC OUT/
SER2_OUT1
DACK2_OUT
RPSF_
DONE2_OUT_
SER2_SPI_M_ENABLE
_OUT/SER2_OUT2
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