Digi Digi Conntect ME, Справочник по аппаратуре

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P r o g r a m m i n g C o n s i d e r a t i o n s
Digi Connect ME GPIO pin use
Name
Register
Bit
Category
External
Interface
Description
Serial
transmit
PORTA7 Allocated
Pin 8 on the 20 pin
header Used for serial transmit. It could be reassigned as
GPIO input or output and used for a general purposes.
DTR/GPIO5 PORTA6 Allocated
Pin 10 on the 20 pin
header
Used for the serial DTR signal. It can be reassigned as
either GPIO input or output and used for a general
purpose. If used in conjunction with the development
board, this pin maps to GPIO5.
RTS/GPIO4 PORTA5 Allocated
Pin 9 on the 20 pin
header.
Used for the serial RTS signal. It could be reassigned
as either GPIO input or output and used for a general
purpose. If used in conjunction with the development
board, this pin maps to GPIO4.
NA PORTA4 Reserved NA NA
Serial
receive
PORTA3 Allocated
Pin 7 on 20 pin
header, Used for serial receive. It could be reassigned as either
GPIO input or output and used for a general purpose.
DSR/GPIO3 PORTA2 Allocated
Pin 12 on 20 pin
header
Used for the serial DSR signal. It could be reassigned
as either GPIO input or output and used for a general
purpose. If used in conjunction with the development
board, this pin maps to GPIO3.
CTS/GPIO2 PORTA1 Allocated
Pin 11 on 20 pin
header
Used for the serial CTS signal, but could be
reassigned as either GPIO input or output and used for
a general purpose. If used in conjunction with the
development board, this pin maps to GPIO2.
DCD/
GPIO1
PORTA0 Allocated
Pin 13 on 20 pin
header.
Used for the serial DCD signal, but could be
reassigned as either GPIO input or output and used for
a general purpose. If used in conjunction with the
development board, this pin maps to GPIO1.
NA PORTC7 Reserved NA NA
Green LED PORTC6 Allocated
Connected to the
green LED
Used as the Ethernet activity LED, but could be
reassigned as a general purpose LED. It must remain
a GPIO output for the LED to operate correctly. The
LED is lit when the signal is a logic low.
/INIT PORTC5 Available
Pin 20 on 20 pin
header Can be configured for either GPIO input or GPIO
output
NA
PORTC4 -
PORTC0
Reserved NA NA
DC_ME-HWR.book Page 37 Thursday, July 1, 2004 11:12 AM