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M10 Hardware Design
M10_HD_V3.0
- 40 -
The Debug Port:
DBG_TXD: Send data to the COM port of a debugging computer
DBG_RXD: Receive data from the COM port of a debugging computer
UART3:
TXD_AUX: Send data to the RXD of DTE
RXD_AUX: Receive data from the TXD of DTE
The logic levels are described in the following table.
Table 9: Logic levels of the serial interface
Table 10: Pin definition of the serial interfaces
Interface
Name
Pin
Function
Debug Port
DBG_RXD
9
Receive data of the debug port
DBG_TXD
10
Transmit data of the debug port
Serial Port
RI 55
Ring
indicator
RTS 58 Request
to
send
CTS 57 Clear
to
send
RXD
61
Receive data of the serial port
TXD
60
Transmit data of the serial port
DTR 59 Data
terminal
ready
DCD
56
Data carrier detection
UART3
TXD3
62
Transmit data of UART3
RXD3
63
Receive data of UART3
3.8.1. UART Port
3.8.1.1. The features of UART Port.
Seven lines on UART interface:
Contain data lines TXD and RXD, hardware flow control lines RTS and CTS, other control
lines DTR, DCD and RI.
Parameter
Min
Max
Unit
V
IL
0 0.25*VDD_EXT
V
V
IH
0.75*VDD_EXT
VDD_EXT
+0.3
V
V
OL
0
0.15*VDD_EXT
V
V
OH
0.85*VDD_EXT
VDD_EXT
V
Содержание M10
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