RoyalTek Confidential
MEB-1315 User Manual
1.9 Hardware interface
Pin definition
Pin Signal Name I/O
Description
Characteristics
1.
RXB
I
Serial port B
V
V
V
V
IL
IH
8
.
0
0.3V
-
,
0
.
2
6
.
3
≤
≤
≥
≥
2.
TXB
O
Serial port B
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
3.
PPS
O
One pulse per
second
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
4.
TXA
O
Serial port A
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
5.
RXA
I
Serial port A
V
V
V
V
IL
IH
8
.
0
0.3V
-
,
0
.
2
6
.
3
≤
≤
≥
≥
6.
GPIO[10]
I/O General purpose I/O
V
V
V
V
IL
IH
8
.
0
0.3V
-
,
0
.
2
6
.
3
≤
≤
≥
≥
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
7.
GPIO[0]
I/O General purpose I/O
V
V
V
V
IL
IH
8
.
0
0.3V
-
,
0
.
2
6
.
3
≤
≤
≥
≥
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
8.
GPIO[1]
I/O General purpose I/O
V
V
V
V
IL
IH
8
.
0
0.3V
-
,
0
.
2
6
.
3
≤
≤
≥
≥
V
V
V
V
V
OL
OH
4
.
0
3
.
0
-
,
4
.
2
1
.
3
≤
≤
≥
≥
9.
N.C
x
x
x
10.
N.C
x
x
x
