Usb Interface; Uart Interface; Mobile Accessory Connector (Mac); Figure 4-7 Diagram Of Usb Interface - Hytera MD78X Service Manual

Baseband Section
4.4.5

USB Interface

MMP
MAP
The radio has two USB interfaces, which are connected to the same USB signal port of the processor.
REF CLOCK is the reference frequency in specified mode. It should be 12MHz in high rate mode or
1.5MHz in low rate mode.
4.4.6

UART Interface

U302 has a total of three UART interfaces, which are utilized to communicate with different external
devices. UART2 is used for communication with front panel and serial port on PC, while UART3 with
Option Board and accessory jack (USB).
4.4.7

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, please refer to
USB_D-
USB_D+
USB_VBUS
MONITOR

Figure 4-7 Diagram of USB Interface

U302
UART2.TX
UART2.RX
UART3_TXD_BT
UART3.TX
UART3_RXD_BT
UART3.RX
UART3_RTS_BT
UART3.RTS
UART3_CTS_BT
UART3.CTS

Figure 4-8 Diagram of UART Interface

USB.PUEN(W4)
VBUS_EN
Vbus
VBUS_DEC
UART2.TX
UART2.RX
TX
UART_RXD
UART_TXD
UART_CTS
UART_RTS
USB_D+
USB_D-
12
USB.DP
USB.DM
USB.PUEN
DATA
GPIO18
A
CS
GPIO9
LCLK
CLOCK
SCLK GPIO7
MPUIO11
RX
CONTROLHEAD
TX
RX
PC
Option Board
MAP
Service Manual
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U302