Option Board Interface - Hytera MD78X Service Manual

Service Manual
the section Interface Definition.
4.4.8

Option Board Interface

J400, an option board interface, is used to achieve specific function by connecting with the designated
option board. The definition of each pin is listed as below:
Pin
Signal
No.
1 GPIO1
3 GPIO2
5 GPIO3
7 GPIO4
9 GPIO5
11 UART-TX
13 UART-RX
15 UART-CTS
17 UART-RTS
2 I2C –SDA
4 I2C -SCL
6 MCBSP-DR
8 MCBSP-WCLK
10 MCBSP-DX
12 MCBSP-FSX
14 AGND
Relative
Function
Option
Board
GPIO I/O
GPIO I/O
GPIO I/O
GPIO O
RESET-OUT O
O
I
UART
I
O
I/O
I2C
O
I
I/O
MCBSP
O
I/O
AGND /
13
I/O
Voltage
to
(VDD=3.3V)
VIH MIN=0.7VDD
VIL MAX=0. 3VDD
VOH MIN=0.8VDD
VOL
MAX=0.22VDD
/
Baseband Section
Remarks
GPIO5: output
signal of the option
board (reset).
GPIO4 and GPIO5:
uni-directional
output interfaces.
They require their
input resistances are
above or equal to
47KΩ.
UART
I2C
McBSP:
Multichannel
Buffered Serial Port
/