A-Link part
Chapter 2. A‐Link part
USB connector (mini USB type B)
• PC USB interface (Debug Keil, IAR ..)
• CMSIS-DAP (Debug)
• COM port
J103 (box header): JTAG pins
Table 2: JTAG pin description
V-Sense
1
2
SWDIO/TMS
GND
3
4
SWCLK/TCK
GND
5
6
NC/TDO
NC
7
8
NC/TDI
GND
9
10
nRESET
V-Sense
1
2
SWDIO/TMS
GND
3
4
SWCLK/TCK
GND
5
6
NC/TDO
NC
7
8
NC/TDI
GND
9
10
nRESET
J2 (box header): SWD connector
Table 3: A-Link SWD pin description
V-Sense
1
2
SWDIO
GND
3
4
SWCLK
GND
5
6
NC
NC
7
8
NC
GND
9
10
nRESET
V-Sense
1
2
SWDIO
GND
3
4
SWCLK
GND
5
6
NC
NC
7
8
NC
GND
9
10
nRESET
P2: MCU power selector
Table 4: Power selection switch description
5.0V
3.3V
External Power
5.0V
3.3V
External Power
J3: USB to UART connection
Table 5: USB to UART description
JP2
Pin
Connection
Short
MCU RXD0
←
PC
TXD
Open
MCU RXD0 Open
JP2
Pin
Connection
Short
MCU RXD0
←
PC
TXD
Open
MCU RXD0 Open
Figure 2: A-Link section - USB & SWD/JATG
Figure 3: A-Link section - UART & P2
Version 1.0.0
Page 5 / 8
Starter Kit Hardware AC33M8128L v1.1
