HYTERA MD78x Series
1 Appearance and Definition
1.1 Appearance and Definition of 10-pin Interface
1.1.1 Appearance
A diagram shows a 10-pin MMP interface on the front panel. It illustrates a plug and socket configuration. The plug has a length of 53.05 mm. The socket has a diameter of approximately 13.40 mm.
Figure 1: 10-pin MMP Interface on the Front Panel
An illustration depicts a 10-pin socket.
Figure 2: 10-pin Socket
An illustration depicts a 10-pin plug.
Figure 3: 10-pin Plug
1.1.2 MMP 10 pin definition
| Item | Name | Type | Description |
| 1 | Accessory detection interface 1 | Digital input | PIN1 and PIN 10 are both for accessory detection; for detailed information, see "accessory detection interface definition" |
| 2 | PTT input | Digital input | Palm microphone PTT input; Low level input when pressing PTT |
| 3 | Handset audio output | Analogue out | When accessory detection code is 00/01/10, the audio output is open; When it is 11, the audio output is closed. |
| 4 | USB_D /serial port RX | USB data cable/input port | Used for DMR USB cable D |
| 5 | GND | Grounding | Differential input (together with MIC input) |
| 6 | USB_VBUS | Power supply | +5V power supply, limited current 500mA; When the accessory detection code is 00/01/10, it output 5V voltage. When the accessory detection code is 11, it output low level voltage. |
| 7 | MIC_INPUT | Analogue input | Palm microphone input, Vrms=80mV@60% system max. deviation |
| 8 | USB_D+/serial port TX | USB data cable/output port | Used for DMR USB cable D+ |
| 9 | HOOK | HOOK signal input | Default: high level. Active: low level. Hook or Monitor function: when press monitor on desktop mic or hook the palm microphone, high level will change into low level. If palm microphone/ palm microphone with keypad is detected, it is hook function; if desktop microphone is detected, |
| 10 | Accessory detection interface 2 | Digital input | PIN1 and PIN 10 are both for accessory detection; for detailed information, see "accessory detection interface definition" |
1.1.3 MMP 10 electrical specifications
| Item | Name | Type | Description |
| 1 | Accessory detection interface 1 | Digital input | 3.3V CMOS voltage level standard |
| 2 | PTT input | Digital input | 3.3V CMOS voltage level standard |
| 3 | Handset audio output | Analogue out | Load resistor > 1k ohm, Vrms = 600mV |
| 4 | USB_D /serial port RX | USB data cable/input port | 3.3V CMOS voltage level standard |
| 5 | GND | Grounding | |
| 6 | USB_VBUS | Power supply | 5V power supply 500mA |
| 7 | MIC_INPUT | Analogue input | Vrms=80mV@60% system max. deviation |
| 8 | USB_D+/serial port TX | USB data cable/output port | 3.3V CMOS voltage level standard |
| 9 | HOOK | HOOK signal input | 3.3V CMOS voltage level standard |
| 10 | Accessory detection interface 2 | Digital input | 3.3V CMOS voltage level standard |
1.1.4 Definition of MMP10 Accessory Identifier:
| PIN1 | PIN10 | Accessory detection definition |
| 0 | 0 | obligated |
| 0 | 1 | Mobile radio is in USB host mode, accessory is in device mode; connect to USB intelligent accessory( such as digital palm microphone) |
| 1 | 0 | Desktop MIC (including desktop microphone with earpiece) |
| 1 | 1 | Mobile radio is in USB device mode, accessory is in host mode/ not connected to any accessory/connect to palm microphone series (default: ordinary palm microphone) |
1.2 Appearance and Definition of 26-pin Interface
1.2.1 Appearance
A diagram shows a 26-pin connector socket, identified as a DB26 connector. It displays dimensions including a width of 44.80±0.20 mm, a height of 33.32±0.25 mm, a pin spacing of 0.50 mm, and a depth of 17.80±0.20 mm.
Figure 4: 26-pin connector socket
An illustration shows the 26-pin connector as it appears on the rear panel of the device.
Figure 5: 26 MAP at rear panel
1.2.2 MAP 26 pin definition
| Item | Name | Type | Description |
| 1 | Vbus USB power supply | Power supply | +5V power supply, limited current 500mA; When the accessory detection code is 00/01/10, it output 5V voltage. When the accessory detection code is 11, it output low level voltage. |
| 2 | GND | Grounding | |
| 3 | GP5_3 universal input/output port (chan_Act) | Digital input/output | Universal input/output port. The functionality is configured by CPS |
| 4 | SW B+ sense power output | Power supply | 13V power supply output; output current <=1.5A |
| 5 | External alarm | Analogue voltage output | Programmable output pin (default: external alarm, the output pin can be configured by CPS) |
| 6 | Power Ground | Power ground | |
| 7 | Tx Audio input ( external MIC audio) | Analogue input | External MIC signal input(rear); active when external PTT is pressed |
| 8 | Rx Audio output | Analogue output | Rx audio signal output |
| 9 | Spkr - | Analogue output | External speaker output - |
| 10 | D+ USB | USB data cable + | USB data cable + |
| 11 | USB_GROUND | USB_GROUND | USB GROUND |
| 12 | GP5_2 universal input/output pin (Monitor) | Digital input/output | Universal input/output pin (default: monitor ; the pin can be configured by CPS) |
| 13 | ACC_IO2 | Digital input | Accessory detection interface (rear); see accessory detection interface definition(rear) |
| 14 | Emerg SW | Digital input | When emergency is effective, this pin inputs low level |
| 15 | ACC_IO3 | Digital input | Accessory detection interface (rear); see accessory detection interface definition(rear) |
| 16 | PRGM_IN_PTT | Digital input | Programmable output pin (default: PTT; low level active; the input pin can be configured by CPS) |
| 17 | Audio ground | Audio ground | |
| 18 | Spkr+ | Analogue output | External speaker output + |
| 19 | D-USB | USB data cable - | USB data cable - |
| 20 | GP5_8 universal input/output pin | output/input | Universal input/output pin |
| 21 | Ground | Ground | |
| 22 | GP5_7 universal input/output pin | output/input | Universal input/output pin |
| 23 | GP5_6 universal input/output pin | output/input | Universal input/output pin |
| 24 | AUX audio out 1 | Analogue output | |
| 25 | AUX audio out 2 | Analogue output | |
| 26 | Ign Sens | Analogue voltage input | Ignition sense input pin |
1.2.3 MAP 26 electrical specifications
| Item | Name | Type | Description |
| 1 | Vbus USB power supply | Power supply | +5V power supply output |
| 2 | GND | Grounding | |
| 3 | GP5_3 universal input/output port (chan_Act) | Digital input/output | 5V TTL level standard |
| 4 | SW B+ sense power output | Power supply | 13V+15% power supply output; output current <=1.5A |
| 5 | External alarm | Analogue voltage output | 13V emergency alarm output |
| 6 | Power Ground | Power ground | |
| 7 | Tx Audio input ( external MIC audio) | Analogue input | Vrms = 80mV@60% system max. deviation |
| 8 | Rx Audio output | Analogue output | Load resistor > 1k ohm, Vrms =300mV |
| 9 | Spkr - | Analogue output | Differential output (together with spl+); Max. output power is 10W (R=8ohm) |
| 10 | D+ USB | USB data cable + | USB data cable + |
| 11 | USB_GROUND | USB_GROUND | USB_GROUND |
| 12 | GP5_2 universal input/output pin (Monitor) | Digital input/output | 5V TTL level standard |
| 13 | ACC_IO2 | Digital input | 5V TTL level standard |
| 14 | Emerg SW | Digital input | 5V TTL level standard |
| 15 | ACC_IO3 | Digital input | 5V TTL level standard |
| 16 | PRGM_IN_PTT | Digital input | 5V TTL level standard |
| 17 | Audio ground | Audio ground | |
| 18 | Spkr+ | Analogue output | Differential output (together with spl-); Max. output power is 10W (R=8ohm) |
| 19 | D-USB | USB data cable - | USB data cable - |
| 20 | GP5_8 universal input/output pin | output/input | 5V TTL level standard |
| 21 | Ground | Ground | |
| 22 | GP5_7 universal input/output pin | output/input | 5V TTL level standard |
| 23 | GP5_6 universal input/output pin | output/input | 5V TTL level standard |
| 24 | AUX audio out 1 | Analogue output | Load resistor >1k ohm, Vrms =300mV |
| 25 | AUX audio out 2 | Analogue output | Load resistor >1k ohm, Vrms =300mV |
| 26 | Ign Sens | Analogue voltage input | Ignition sense input voltage >7V |
Note: CPS = computer programming software
1.2.4 MAP accessory detection definition (rear)
| PIN1 | PIN10 | Accessory detection definition |
| 0 | 0 | Programming cable |
| 0 | 1 | Mobile radio is in USB host mode, accessory is in device mode; connect to USB intelligent accessory |
| 1 | 0 | External speaker |
| 1 | 1 | Mobile radio is in USB device mode, accessory is in host mode/ not connected to any accessory/connect to palm microphone series (default: ordinary palm microphone) |
1.3 Note
1. Front panel PTT, rear PTT, front panel MIC and rear MIC can be opened by CPS freely. Default: front panel PTT and front panel MIC is opened
1.4 Supplementary
5V TTL level standard. TTL high level: 3.6 – 5V, low level: 0 – 2.4 V. Output L: <0.8V; H: >2.4V. Input L: <1.2V; H: > 2.0V. TTL output low level should be less than 0.8V, while high level should be more than 2.4V.
TTL input is 0 when input level is less than 1.2, and 1 when input level is more than 2.0.
3.3V CMOS level standard. Vcc : 3.3V. VOH > = 3.2V; VOL <=0.1V. VIH >= 2.0V; VIL <= 0.7V. Note : "VIH” = high level of input voltage. "VIL" = low level of input voltage. "VOH" = high level of output voltage. "VOL" = low level of output voltage.
1.5 Programming cable MD78x layout
A wiring diagram illustrates the connection between a Hytera radio (Funkgerät) and a PC for programming. It shows two connection types: a DB26 HD connector and a 10-pin MMP connector on the radio side, both connecting to a standard USB connector on the PC. For the DB26 connector, pins 11 and 9 are Signal-Ground (black and green wires respectively), pin 10 is USB Data+ (green wire), pin 19 is USB Data- (white wire), and USB +5V is provided. The housing is connected to the shield. For the 10-pin MMP connector, pin 5 is Signal-Ground (black wire), pin 8 is USB Data+ (green wire), pin 4 is USB Data- (white wire), and USB +5V is provided. The housing is connected to the shield. Red wires are noted as "rot bleibt frei" (remain free).
1.6 Programming cable PD78x layout
A wiring diagram illustrates the connection between a Hytera radio's 16-pin accessory connector and a PC for programming. It shows the 16-pin connector on the radio side connecting to a standard USB connector on the PC. Pin 1 is Signal-Ground (black wire), pin 7 is USB Data+ (green wire), pin 8 is USB Data- (white wire), and pin 13 is the detecting Port. USB +5V is provided. The shield connection is noted as "Schirm bleibt frei" (shield remains free), but the housing is connected to the shield. Red wires are noted as "rot bleibt frei" (remain free).
