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xTAG v3.0 Hardware Manual
3/8
Pin
Signal
Direction
Description
1
5V
Target to Host
Power
2
NC
N/A
No connection
3
MSEL
Host to Target
Select boot from JTAG - Active Low
4
GND
N/A
Ground
5
TDSRC
Host to Target
JTAG Test Data
6
XL1_UP1
Target to Host
xCONNECT Link
7
TMS
Host to Target
JTAG Test Mode Select
8
GND
N/A
Ground
9
TCK
Host to Target
JTAG Test Clock
10
XL1_UP0
Target to Host
xCONNECT Link
11
DEBUG
Bidirectional
Debug
12
GND
N/A
Ground
13
TDSNK
Target to Host
JTAG Test Data
14
XL1_DN0
Host to Target
xCONNECT Link
15
RST_N
Host to Target
System Reset - Active Low
16
GND
N/A
Ground
17
UART_RX
Host to Target
Serial Port
18
XL1_DN1
Host to Target
xCONNECT Link
19
UART_TX
Target to Host
Serial Port
20
GND
N/A
Ground
The routing of these I/O pins along with the power pins is shown below.
3.1
xCONNECT Link configuration
Some of the I/O pins on the processor are configured as a duplex 2-bit serial
xCONNECT Link. The mapping of xCONNECT Link to the pins is shown in the table
below:
XM006125A