R305 AT Commands
©2011 Telegesis (UK) Ltd
- 63 -
AT Command Manual (Rev 3.05)
S13
– ETRX2: Pull-up enable ETRX3: I/O Configuration
Description
Configures the I/O pins.
Setting a bit on the ETRX2 enables the built-
in pull-up on the corresponding pin.
Setting a bit on the ETRX3 will have the
following effect:
S13 S16
S18
0
0
0
Floating Input
0
0
1
floating input
0
1
0
Output driving 0
0
1
1
Output driving 1
1
0
0
Input with pull-down
1
0
1
Input with pull-up
1
1
0
Open Drain Output (0)
1
1
1
Open Drain Output
(open)
Operations
R/W LOCAL
R/W REMOTE
Becomes effective
After Reset
Note
To achieve ultra low current consumption it is
recommended not to use the built-in pull-ups
and leave this register in its default state.
Storage
Non-Volatile
Parameters
XXXX (ETRX2) or XXXXXXXX (ETRX3)
Where XXXX represents a 16-bit hexadecimal
number and XXXXXXXX represents a 32-bit
hexadecimal number.
ETRX2: representing I/O pins
xx
<TXD><RXD> BA98 7654 3210
e.g. setting bit 7 to 1 will enable the pull-up for I/O
pin 7
ETRX3: representing the I/O pins
xxxxxxxx <PC7…PC0> <PB7…PB0> <PA7…PA0>
e.g. setting bit 7 to 1 will configure PA7 to either be
an input with pull-up or pull-down, or an open-drain
output.
Factory Default
ETRX2: 0000
ETRX3: 00000000
SW release
R300