Renesas S3A1, User Manual

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Target Board Kit S3A1 (TB-S3A1) Hardware Layout
R12UM0022EU0100 Rev.1.00 Page 15 of 36
Feb 6, 2018
Table 6 JTAG Interface Conflicts
Programming Interface Conflicting Interface
Port Use Interface Use
P108 TMS / J-Link SWDIO SPI SSLB0_B fixed function, J1-13
P109 TDO / J-Link SWO SPI MOSIB_B fixed function, J1-7
P110 TDI SPI MISOB_B fixed function, J1-9
P300 SWCLK GPT GTIOC0A_A fixed function, J1-31
4.4.4 LEDs
Two LEDs are provided on the TB-S3A1 Target Board. Target Board U1 is the Main MCU, and directly controls
LED1. See Figure 5 for LED1 location, Figure 8 for LED2 location, and Figure 7 for LED2 circuit. Target Board U2 is
the J-Link MCU, and controls the Red LED in LED2.
Figure 12 LED1 Control Circuit
The behavior of the LEDs is described in the following table.
Table 7 Target Board LED functions
Designator Color Function MCU control port MCU pin
LED1 Red User LED U1 P106 U1-102
LED2 Red J-Link Indicator JLED
(U2 P103) U2-45
LED2 Green 3.3V Power Available +3V3 N.A.
To disconnect your LED from the MCU signal P106, copper jumper E3 must be open.
4.4.5 Switches
Two miniatures, momentary, mechanical push-button type SMT switches are mounted on the Target Board.
Pressing the RESET Switch generates a reset signal to restart the Main MCU.
To disconnect your Switch from the MCU signal P105/IRQ0, copper jumper E4 must be open.