Advertisement
3.2.3.2 UART interface signals
According to newest Qseven
®
Rel. 2.0 specifications, Q7-A29 can offer one UART interface, which is derived from AMD G-series SOC's USB port #6 by using an
USB-to-Serial bridge (Cypress CY7C65215). The UART interface is derived by device's serial port #0.
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.
UART0_RTS#: UART Interface, Handshake signal, Request to Send (output) line, 3.3V_S electrical level.
UART0_CTS#: UART Interface, Handshake signal, Clear to Send (Input) line, 3.3V_S electrical level.
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 schematic here on the right shows an
example
of
implementation
transceiver on 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-A29
Q7-A29 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
of
RS-232
C4
CC-100nF/25V
UART0_TX
UART0_RTS#
UART0_RX
UART0_CTS#
C5
CC-100nF/25V
+3.3V_S
U1
1
16
C1+
VCC
C1
CC-100nF/25V
3
15
C1-
GND
11
14
RS232_TX
T1IN
T1OUT
10
7
RS232_RTS#
T2IN
T2OUT
12
13
RS232_RX
R1OUT
R1IN
9
8
RS232_CTS#
R2OUT
R2IN
4
2
C2+
V+
C2
5
6
CC-100nF/25V
C2-
V-
SP3232ECY
C3
CC-100nF/25V
P1
10
5
9
4
8
RS232_CTS#
3
7
RS232_RTS#
2
6
1
11
DB9 CONNECTOR
28
Advertisement
