1. Application Fields
Miniaturization digital interphone
Digital communication system of mobile phone
2.Characteristics
FrequencyRange: 400~470MHz
FrequencySpace: 12.5kHz
RF output power: high power 2W, low power 0.5W
SupplyVoltage: 4V
HighReceivingSensitivity: ?‐118dBm
Supportwriting‐frequency
Support the DMR protocol and compatible with traditional analog intercom mode
The following businesses are supported underthe mode of DMR
Support group calling, individual calling, general calls
Support acknowledged/unacknowledged SMS communication and status short
message
Support calling/called detection
Support call alert
Support remote monitoring
Support emergency alarm
Support killing in a long distance/activating
Support voice and SMS application with shoot‐through state and relay mode
The following businesses are supported underthe mode ofanalog communication
Support CTCSS/CDCSS tone squelch
Supportmonitoring
The module board as shown in Figure 1, and its size is 23.9mm×39.5mmx3.8mm. The definition of Pin as shown in table
3.Module Pin Name:
Pin Pin Name Pin Functional Description
No. Category
1 SPK_EN DIO Speaker output control enable
2 NC
3 LINE_OUT AO Audio output
4 +3.3V POWER Module burn口(external test point or hang in the air)
5 PTT DI Module transmitter/receiver control enable. 1is receiver, 0 is transmitter.
6 PWD DI Module makes enable sleep, and 0 is sleeping
7 NC
8 VBAT POWER Power Supply
9 GND GND Ground
10 GND GND Ground
11 NC
12 ANT Connect the antenna
13 ARM‐RST DIO Module burn口(external test point or hang in the air)
14 SWDIO DIO Module burn口(external test point or hang in the air)
15 SWCLK DIO Module burn口(external test point or hang in the air)
16 UART_RX DI AsynchronousSerial Port(Receive Date口)
17 UART_TX DO AsynchronousSerial Port(Send Date口)
18 MIC_IN AI Audio output
19 GND GND Ground
20 GND GND Ground
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