Hytera DMR - Menu Navigation; Advanced Settings and Info

Service Manual
15
Pin
No.
Signal Function
I/O
Relative
to
Option
Board
Voltage
(VDD=3.3V)
Remarks
1
3
5
7
9
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO
GPIO
GPIO
GPIO
RESET-OUT
I/O
I/O
I/O
O
O
GPIO5: output
signal of the option
board (reset);
GPIO4 and GPIO5:
uni-directional
output interfaces.
They require their
input resistance is
above or equal to
47KΩ.
11
13
15
17
UART-TX
UART-RX
UART-CTS
UART-RTS
UART
O
I
I
O
UART
2
4
I2C –SDA
I2C -SCL
I2C
I/O
O
I2C
6
8
10
12
MCBSP-DR
MCBSP-WCLK
MCBSP-DX
MCBSP-FSX
MCBSP
I
I/O
O
I/O
VIH MIN=0.7VDD
VIL MAX=0. 3VDD
VOH MIN=0.8VDD
VOL
MAX=0.22VDD
McBSP:
Multichannel
Buffered Serial Port
14 AGND AGND
16 AF OB TO MB AF I
80mv (standard
output from the
option board to the
main board)
MAX:700mV
18 AF MB TO OB AF O
80mv (standard
output from the
main board to the
option board)
MAX:700mV
19 DGND DGND
20 3V6 or 5V Power O
Power supply:
5.0V