Motorola MTP700 Detailed Service Manual page 63

TRANSCEIVER 400 MHz
Side Connector
The side connector is intended to support connection to accessories such as PSM, RSM,
Headset, 2 or 4-wire data terminals and SB9600 based devices.
The side connector has 16 modes of operation as shown in Table 4.1-3.
In order to be compatible with previous generation radios, the modes of operation are
selected by applying the appropriate logic levels to the Side Option Select Pins named
SIDE_OPTION1, SIDE_OPTION2. In addition, SIDE_OPTION3 will be used to select the
other modes as per Table 4.1-3. Voltage level for SIDE_OPTION3 is per Table 4.1-4.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
MTP700 Portable Radio / Detailed Service Manual
Table 4.1-3 Side Connector Mode Table
Mode
Ext PTT
Emergency
Volume Up
Volume Down
Man Down
MAP27
Spare
SB9600/SBEP
4-Wire Data (RS232)
2-Wire Data (RS232)
Ext Spkr
RSM with earbud
RSM/PSM
User Programmable 2
User Programmable1
Idle
Min Level/V
V0 0
V1 0.62
V2 1.02
V3 1.42
V4 1.82
Table 4.1-4 Voltage Levels for Side Option3
SIDE SIDE
OPTION1 OPTION2
0 0
0 0
0 0
0 0
0 0
1 0
1 0
1 0
1 0
1 0
0 1
0 1
0 1
0 1
0 1
1 1
Typical/V Max Level/V
0.3 0.58
0.8 0.98
1.2 1.38
1.6 1.78
2.1 2.30
4.1 - 29
SIDE
OPTION3
V4
V3
V2
V1
V0
V4
V3
V2
V1
V0
V4
V3
V2
V1
V0
V4