General purpose i/o (gpio) – Digi NS9215 User Manual
Page 31
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P I N O U T ( 2 6 5 )
General purpose I/O (GPIO)
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G e n e r a l p u r p o s e I / O ( G P I O )
Some signals are multiplexed to two or more GPIOs, to maximize the number of
possible applications. These duplicate signals are marked as (dup) in the
Descriptions column in the table. Selecting the primary GPIO pin and the
duplicate GPIO pin for the same function is not recommended. If both the
primary GPIO pin and duplicate GPIO pin are programmed for the same
function, however, the primary GPIO pin has precedence and will be used.
The I
2
C module must be held in reset until the GPIO assigned to I
2
C has been
configured.
D12
txd[2] / gpio[46]
U
I/O
2
TX data 2
C12
txd[1] / gpio[45]
U
I/O
2
TX data 1
B13
txd[0] / gpio[44]
U
I/O
2
TX data 0
B15
tx_er / gpio[43]
U
I/O
2
TX code err
B14
tx_en / gpio[42]
U
I/O
2
TX enable
C14
col / gpio[48]
U
I/O
2
Collision
C13
crs / gpio[49]
U
I/O
2
Carrier sense
A14
rx_clk / gpio[34]
U
I/O
2
RX clock
E17
rxd[3] / gpio[41]
U
I/O
2
RX data 3
D16
rxd[2] / gpio[40]
U
I/O
2
RX data 2
B17
rxd[1] / gpio[39]
U
I/O
2
RX data 1
D13
rxd[0] / gpio[38]
U
I/O
2
RX data 0
C17
rx_er / gpio[37]
U
I/O
2
RX error
D17
rx_dv / gpio[36]
U
I/O
2
RX data valid
Pin
Signal
U/D
I/O
OD
Description