Hytera MD78X Service Manual

UHF5 (806MHz
–
941MHz)
Interface Definition
39
Pin
No.
Name Type
Signal Electrical
Performance
Description
interface; hi
gh level by default.
This pin and Pin 15 (ACC_IO3)
can compose three accessory
identification statuses. Please
refer to the “
DB26 Accessory
Identification Matrix Table”
below for detailed function
definitions.
14 Emerg Sw Digital input 5V TTL
Emergency s
witch. This pin is
valid when low level is input.
15 ACC_IO3 Digital input 5V TTL
Accessory identification
interface; high level by default.
This pin and Pin 13 (ACC_IO2)
can compose three accessory
identification statuses. Please
refer to the “
DB26 Accessory
Identification Matrix Table””
below for detailed function
definitions.
16 PRGM_IN_PTT Digital input 5V TTL
Programmable input pin (PTT
key of external Mic by default; its
function is programmable via
CPS). It is valid at low level.
17 Audio Ground
Audio
(grounding)
/ /
18 SPK+
Analog
signal
output
It forms differential output
together with SPK-
. Max
power output: 10 W(R=8 Ω)
External speaker output+
19 D-
USB data
cable-
USB data USB data cable-
20 GP5_8
Digital
5V TTL GPIO. Programmable via CPS.

Hytera MD78X Specifications

General

Brand	Hytera
Model	MD78X
Category	Radio
Language	English