Product Manual

sETRX357-LRS Family
©2014 Telegesis (UK) Ltd - 18 - sETRX357-LRS Product Manual
8 Digital I/O Specifications
The digital I/Os of the sETRX357-LRS module have the ratings shown below.
V
CC
= 3.0V, T
AMB
= 25°C, NORMAL MODE unless otherwise stated
No. Item
Condition /
Remark
Symbol Value Unit
Min
Typ
Max
1
Low Schmitt switching
threshold
Schmitt input
threshold going
from high to low
V
SWIL
0.42 x V
CC
0.5 x V
CC
Vdc
2
High Schmitt switching
threshold
Schmitt input
threshold going
from low to high
V
SWIH
0.62 x V
CC
0.8 x V
CC
MHz
3 Input current for logic 0 I
IL
-0.5 µA
4 Input current for logic 1 I
IH
0.5 µA
5
Input Pull-up resistor
value
R
IPU
24 29 34 kΩ
6
Input Pull-down resistor
value
R
IPD
24 29 34 kΩ
7 Output voltage for logic 0
I
OL
= 4mA (8mA) for
standard (high
current) pads
V
OL
0 0.18 x V
CC
V
8 Output voltage for logic 1
I
OH
= 4mA (8mA)for
standard (high
current) pads
V
OH
0.82 x V
CC
V
CC
V
9 Output Source Current
Standard current
pad
I
OHS
4 mA
10 Output Sink current
Standard current
pad
I
OLS
4 mA
11 Output Source Current High current pad (1) I
OHH
8 mA
12 Output Sink current High current pad (1) I
OLH
8 mA
13 Total output current I
OH
+ I
OL
40 mA
Table 10. Digital I/O Specifications
No. Item
Condition /
Remark
Symbol Value Unit
Min
Typ
Max
1
Low Schmitt switching
threshold
Schmitt input
threshold going
from high to low
V
SWIL
0.42 x V
CC
0.5 x V
CC
Vdc
2
High Schmitt switching
threshold
Schmitt input
threshold going
from low to high
V
SWIH
0.62 x V
CC
0.68 x V
CC
Vdc
3 Input current for logic 0 I
IL
-0.5 µA
4 Input current for logic 1 I
IH
0.5 µA
5
Input Pull-up resistor
value
Chip not reset R
IPU
24 29 34 kΩ
6
Input Pull-up resistor
value
Chip reset R
IPURESET
12 14.5 17 kΩ
Table 11. nReset Pin Specifications
Notes
1) High current pads are PA6, PA7, PB6, PB7, PC0