SATEL-TR4+
Integration Guide, Version 1.6
18
4.2
Pin order of the DTE connector
Direction IN is data from DTE (Data Terminal Equipment) to the radio transceiver module.
Direction OUT is data from the radio module to the DTE.
The equivalent I/O schematic figures are shown in the next chapter.
Pin No.
Equivalent
I/O
Schematic
Signal
name
Type
Direction
Pin State
Description
1,2
Figure 1
VCC_IN
POWER
IN
External Voltage DC input
3,4
-
GND
GND
-
External Ground Ground reference for
power and signals
5
Figure 2
VCC_IO
POWER
IN
External Voltage Device IO driver input
6
Figure 7
ENA_MOD
IO
IN
Internal Pull
Down
Module ENA pin
7
Figure 3
RD1
CMOS
OUT
Output Driver
Receive data, active low.
8
Figure 3
CTS1
CMOS
OUT
Output Driver
Clear To Send, active
low.
9
Figure 6
TD1
CMOS
IN
Internal Pull Up Transmit Data, active
low.
10
Figure 6
RTS1
CMOS
IN
Internal Pull Up Ready to send, active
low.
11
Figure 4
GPIO1
CMOS
OUT
Internal Pull
Down
Reserved for future use.
12
Figure 4
GPIO2
CMOS
OUT
Internal Pull
Down
Reserved for future use.
13
Figure 6
GPIO3
CMOS
IN
Internal Pull Up Reserved for future use.
14
Figure 6
GPIO4
CMOS
IN
Internal Pull Up Reserved for future use.
15
Figure 5
STAT
CMOS
OUT
Output Driver
Various sequences
(section 4.6).
16
Figure 6
GPIO5
CMOS
IN
Internal Pull Up Reserved for future use.
17
Figure 6
SERVICE
CMOS
IN
Internal Pull Up Input for service access,
active low. See separate
section of the manual
(section 4.5).
18
Figure 4
GPIO6
CMOS
OUT
Internal Pull
Down
Reserved for future use.
19
Figure 4
GPIO7
CMOS
OUT
Internal Pull
Down
Reserved for future use.
20
Figure 4
GPIO8
CMOS
OUT
Internal Pull
Down
Reserved for future use.
