R
R
S
S
9
9
1
1
1
1
0
0
-
-
N
N
-
-
1
1
1
1
-
-
2
2
2
2
/
/
2
2
4
4
/
/
2
2
6
6
/
/
2
2
8
8
–
–
S
S
e
e
l
l
f
f
-
-
C
C
o
o
n
n
t
t
a
a
i
i
n
n
e
e
d
d
W
W
L
L
A
A
N
N
M
M
o
o
d
d
u
u
l
l
e
e
s
s
w
w
i
i
t
t
h
h
N
N
e
e
t
t
w
w
o
o
r
r
k
k
i
i
n
n
g
g
S
S
t
t
a
a
c
c
k
k
4.3:
Header J7
The Header labeled J7 is used for the SPI interface. The pin configuration of this
header is as follows:
Figure 40:
Pin Configuration of Header J7
4.4:
Header J6
The Header labeled J6 is used for interfacing the EVB over UART to a second PCB
which has the Host microcontroller mounted. This header bypasses the DB9
connector and the 3.3V-5V level shifter ICs and a simple ribbon-cable can be
used for this interface. This header can be enabled/disabled by flipping the
switches SW4 and SW5. The pin configuration of this header is as follows:
Figure 41:
Pin Configuration of Header J6
4.5:
Switches SW4 and SW5
The Switches SW4 and SW5 are used to select between the DB9 connector and
the Header J6 for the UART interface. In the images of the EVBs shown above,
the switches are placed (to the right on the RS9110-N-11-22/24 EVB and to the
left on the RS9110-N-11-26/28 EVB) to enable the DB9 connector. If they are
flipped, the Header J6 is enabled.
Redpine Signals, Inc. Proprietary and confidential
Page 44
