User's Manual
HT8000-I/HT8000-II/HT8000-VI
2 Hardware Architecture
Version 1.4(Oct.2019)
Beijing Huahuan Electronics Co., Ltd.
37
Table 2-15
Definition of external clock input\output ports
Pin
Definition
Description
1
IN+
IN is Rx
OUT is Tx
2
IN-
3
CGND
4
OUT+
5
OUT-
6
CGND
7
-
8
-
1PPS+TOD Port
MX02 card provides 1 1PPS TOD port with configurable input and output.
It is marked with “1PPS TOD”, using RJ45 socket. RJ-45 connector
diagram and pin definition are shown in Figure 2-9 and Table 2-16.
Table 2-16
1PPS+ToD port pin definition
Pin
Definition
Description
1
-
-
2
-
-
3
RS-422_1_N
1PPS -
4
GND
GND
5
GND
GND
6
RS-422_1_P
1PPS+
7
RS-422_2_N
TOD time information
8
RS-422_2_P
TOD time information