Telit Wireless Solutions BlueMod+S42M, Руководство пользователя по оборудованию

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S42M Hardware User Guide
1VV0301379 Rev. 4 Page 23 of 48 2018-11-28
DC Parameter
6.4.1. General Purpose I/O (GPIO)
T
amb
= 25°C
Symbol Item Condition
Limit
Unit
Min Typ Max
V
IL
Input Low Voltage
VSUP = 3,3V
VSUP = 2,8V
- 0
0,9
0,8
V
V
IH
Input High Voltage
VSUP = 3,3V
VSUP = 2,8V 2
1,8
3,3
2,8 3,6
3,1
V
V
OL
Output Low Voltage
VSUP = 3,3V
VSUP = 2,8V
0 -
0,33
0,28
V
V
OH
Output High Voltage
VSUP = 3,3V
VSUP = 2,8V 2,97
2,5
-
3,3
3,1
V
I
OL
/I
OH
Low and High Level
Output Current
A4, F1
VSUP=3.3V
- 20 - mA
Other Pads
VSUP=3.3V
- 8 - mA
R
PU
/R
PD
pull-up/down resistor - 10 - k
Ω
Table 7: DC Characteristics, Digital IO
6.4.2. Reset
S42M contains a voltage supervisory circuit that monitors VSUP.
The reset device initiates an internal reset signal whenever:
•
VSUP drops below V
IT-
or
•
EXT-RES# is
≤V
ILMR
The reset remains active for 200 ms (typical) after:
•
VSUP rises above V
IT-
+ V
hys
and
•
EXT-RES# is
≥V
IHMR
T
amb
= 25°C
Symbol Item
Limit
Unit
Min Typ Max
V
(POR)
VSUP for valid reset function 0,6 V
V
IT-
Negative going Threshold 1,628 1,670 1,695 V
V
hys
Hysteresis 17 mV
V
ILMR
EXT-RES# low-level input voltage 0,3VSUP V
V
IHMR
EXT-RES# high-level input voltage 0,7VSUP
R
PU
pull-up resistor 10 20 30 k
Ω
Table 8: Reset Characteristics