57
57
57
57
J23 pinout:
Factory default setting:
3-4 short
,
5-6 short
,
11-12 short
,
13-14 short
Note: jumper names are valid for the Main board version 1.3. If your
motherboard version is different form that one, please download a new
version of this document
The
Serial line reset
function is used by both the PE and Softune debugger. Its
purpose is to allow reseting the board through the debugger communication
interface. The Serial line reset function is provided on all the three RS232
interfaces – UART0, UART1 and User UART (DTR lines of these interfaces
are dedicated to this function). However, it is possible to use only two of these
ports concurrently: the User UART and one of the UART0 or UART1. For each
of these two ports, the reset polarity of the DTR line can be choosen.
J5: Port selection (UART 0-1) for the Serial line reset
In
1-2 position,
the DTR
0
line of the UART0 RS-232 interface is connected
to the J21, pin 8.
In
2-3 position
, the DTR
1
line of the UART1 RS-232 interface is connected
to the J21, pin 8.
Note: the selected DTR
x
line is connected to the UART reset logic only if
there is a jumper in the 7-8 position on the J21 header.
J2: UART0&1 Serial line reset - polarity selection
In the
1-2 position
, the “1” level on the selected DTRx
line will cause the
CPU reset,
In the
2-3 position
, the “0” level on the selected DTRx line will cause the
CPU reset.
Serial line reset
jumpers:
UART 0&1 serial
line reset jumpers:
GND 1
SOTU 3
SINU 5
To User UART reset
VCC 9
RTSU 11
CTSU 13
NC 15
2 GND
4 to RS232
F
input
6 from RS232
F
output
8 from RS232
F
output for
10 VCC
12 from RS232
F
output
14 from RS232
F
output
16 NC
