Advertisement
3.2.3.2 UART interface signals
®
According to newest Qseven
Rel. 2.0 specifications, Q7-928 offers one UART interface, directly managed by i.MX6 processor (all versions).
Here following the signals related to UART interface:
UART0_TX: UART Interface, Serial data Transmit (output) line, 3.3V_S electrical level
UART0_RX: UART Interface, Serial data Receive (input) line, 3.3V_S electrical level with 10kΩ pull-up resistor
Please consider that interface is at TTL electrical level; therefore, please evaluate well the typical scenario of application. If it is not explicitly necessary to interface
directly at TTL level, for connection to standard serial ports commonly available (like those offered by common PCs, for example) it is mandatory to include an RS-
232 transceiver on the carrier board.
The following schematic shows an example of implementation of RS-232 transceiver for the Carrier board
All schematics (henceforth also referred to as material) contained in this manual are provided by SECO S.r.l. for the sole purpose of supporting the
customers' internal development activities.
The schematics are provided "AS IS". SECO makes no representation regarding the suitability of this material for any purpose or activity and disclaims all
warranties and conditions with regard to said material, including but not limited to, all expressed or implied warranties and conditions of merchantability,
suitability for a specific purpose, title and non-infringement of any third party intellectual property rights.
The customer acknowledges and agrees to the conditions set forth that these schematics are provided only as an example and that he will conduct an
independent analysis and exercise judgment in the use of any and all material. SECO declines all and any liability for use of this or any other material in
the customers' product design
Q7-928
Q7-928 User Manual - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by P.Z Copyright © 2016 SECO S.r.l.
U1
2
C1+
C1
4
CC-100nF/25V
C1-
16
+3.3V_S
SHDN
1
EN
11
UART0_TX
T1IN
9
UART0_RX
R1OUT
+3.3V_S
15
VCC
C3
14
CC-100nF/25V
GND
SP3220ECY
5
C2+
C2
6
CC-100nF/25V
C2-
10
N.C.
12
N.C.
13
RS232_TX
T1OUT
8
RS232_RX
R1IN
3
V+
C4
7
CC-100nF/25V
V-
C5
CC-100nF/25V
P1
10
5
9
4
8
3
7
2
6
1
11
DB9 CONNECTOR
28
Advertisement
