Rev. 6.2
Micronet SmarTab 8 – Hardware Guide
48 / 61
8
RS232_TX1
O
Transmit Data (COM1)
EIA-RS232 level
9
O.C. Output
O
Open Collector Output 1
Max. switchable current = 300mA
Max. switchable voltage = +V
IN
Max. saturation voltage = 0.6V
10
RS232_TX5
O
Transmit Data DBG
MCU Debug port EIA-RS232 level
11
RS232_RX5
I
Receive Data DBG
MCU Debug Port EIA-RS232 level
12
RS232_RX1
I
Receive Data (COM1)
EIA-RS232 level
13
GND
G
Ground
14
Automotive Input
I
Digital Input 1
Typical Min Max
Input Low: V
IL
0V
-30V 6V
Input High: V
IH
12V-24V
+
8V +30V
0V-30V max, 12k OHM
15
N/A
Pinout by Functionality
The following table lists the 15-pin D’sub connector signals by functionality.
Table 5:
Main Connector Signal Map (by functionality)
Pin
Signal
Type
Function
Specifications
1
+VIN
V
Input Power 12V/24V
Typical
– 12V/24V
-
Minimum continues
– 6V (5V for up to
40ms according to ISO7637)
-
Maximum continues
– 32V
2
GND
G
Ground
3
Ignition Input
A
A2D Input
Ignition switch
Typical Min Max
Input Low: VIL 0V -30V 6V
Input High: VIH 12V-24V +8V +32V
4
USB D-
B
USB Port Data-
USB 3.0
5
USB D+
B
USB Port Data+
USB 3.0
6
USB +5V
P
USB Port VBUS
7
GND
G
Ground
Pin
Signal
Type
Function
Specifications
8
RS232_TX1
O
Transmit Data (COM1)
EIA-RS232 Level
9
O.C. Output
O
Open Collector
Output 1
Max. switchable current = 300mA Max.
switchable voltage = +VIN
Max. saturation voltage = 0.6V
10
RS232_TX5
O
Transmit Data DBG
MCU Debug port EIA-RS232 Level
