Renesas Synergy™ Platform
Target Board Kit S1JA (TB-S1JA)
R12UM0025EU0101 Rev.1.01
Page 16 of 31
Apr.21.20
5.4.3 SWD (JTAG)
A 10-pin Cortex Debug Connector is provided at J10.
Note: S1JA MCU does not have JTAG support, only SWD.
Table 4. SWD (JTAG) Connector (J10)
JTAG Connector
TB-S1JA
Pin
SWD pin name
Signal/Bus
1
VTref
+3V3
2
SWDIO
U1 P108/SWDIO (U1-33)
3
GND
GND
4
SWCLK
U1 P300/SWCLK (U1-32)
5
GND
GND
6
N.C.
N.C.
7
N.C.
N.C.
8
N.C.
N.C.
9
GNDDetect
N.C. (short E31 to connect to GND)
10
nSRST
U1 RESET# (U1-25)
The Cortex
®
Debug Connector is fully described in the Arm
®
CoreSight™ Architecture Specification.
The J-Link MCU Power copper jumper and J-Link Disconnects copper jumpers may be open for proper
operation of the SWD interface to prevent interactions with the J-Link MCU. See section 4.4.2, Debug USB
for details.
If a SWD (JTAG) adapter is in use that properly interprets the Arm
®
Cortex
®
10-pin Debug
connector assignment of pin 9 to GND, SWD GNDDetect copper jumper E31 should be
closed. If the SWD adapter used is one of several that may be confused or damaged by the
presence of GND at pin 9, E31 should be open (as shipped).
The J-Link OB interface is multiplexed with the SWD interface, and can collectively be referred to as the
Programming Interface. While the J-Link OB interface and the SWD interface do not conflict, the J-Link OB
signals may be isolated from the programming interface by changing the copper jumpers as described in
section 4.4.2, Debug USB.
5.4.4 LEDs
Two LEDs are provided on the TB-S1JA Target Board. Target Board U1 is the Main MCU, and directly
controls LED1. See Figure 6 for LED1 location, Figure 9 for LED2 location, Figure 13 for LED1 circuit, and
Figure 8 for LED2 circuit. Target Board U2 is the J-Link MCU, and controls the red LED in LED2.
Figure 14. LED1 Control Circuit