Hytera MD78X Service Manual

UHF3 (350
–
400 MHz)
Circuit Description
19
 UART Interface
U302
UART2.TX
UART2.RX
UART3.TX
UART3_CTS_BT
UART3.RTS
UART3.CTS
UART1.TX
UART1.RX
GPS
RX
TX
CONTROLHEAD
（GPIO17/GPIO18）
RX
TX
Option Board
MAP
UART_RXD
UART_TXD
UART_CTS
UART_RTS
USB_D+
USB_D-
PC
RX
TX
GPS_UART1_TXD
GPS_UART1_RXD
UART2.TX
UART2.RX
UART3_TXD_BT
UART3_RXD_BT
UART3_RTS_BT
UART3.RX
Processor U302 provides three UART interfaces, which are used to communicate with different
external devices.
 UART1 is used for communication with GPS module.
 UART2 is used for communication with front panel (GPIO17 and GPIO18).
 UART3 is used for communication with the Option Board and accessory connector.
 USB Interface
USB.DM
USB.PUEN
U302
USB.DP
MMP
GPIO18
GPIO9
GPIO7
MPUIO11
DATA
CS
CLOCK
A
LCLK
SCLK
VBUS_EN
Vbus
MONITOR
VBUS_DEC
USB.PUEN(W4)
MAP
USB_VBUS
USB_D-
USB_D+
The mobile radio provides two USB interfaces, which are connected to the same USB signal port of
the processor U302.
 Mobile Accessory Connector (MAC)
Mobile accessory connector contains audio interface, programmable I/O port, serial port, USB port,
accessory identifier port and etc, which are applied for further development. For details, see 7
Interface Definition.

Hytera MD78X Specifications

General

Brand	Hytera
Model	MD78X
Category	Radio
Language	English