SLAU647O July 2015 – April 2020
Table 8 describes the electrical state of every JTAG pin after debug probe power up.
Pin | Name | After Power up | When JTAG Protocol is Active | When Spy-Bi-Wire Protocol is Active |
---|---|---|---|---|
1 | TDO/TDI | Hi-Z, pulled up to 3.3 V | In, TDO | In and Out, SBWTDIO (RST pin) |
2 | VCC_TOOL | 3.3 V | Target VCC | Target VCC |
3 | TDI/VPP | Hi-Z, pulled up to 3.3 V | Out, TDI | Hi-Z, pulled up to VCC |
4 | VCC_TARGET | In, external VCC sense | In, external VCC sense | In, external VCC sense |
5 | TMS | Hi-Z, pulled up to 3.3 V | Out, TMS | Hi-Z, pulled up to VCC |
6 | N/C | N/C | N/C | N/C |
7 | TCK | Hi-Z, pulled up to 3.3 V | Out, TCK | Out, SBWTCK |
8 | TEST/VPP | Out, Ground | Out, TEST | Hi-Z, pulled up to VCC |
9 | GND | Ground | Ground | Ground |
10 | UART_CTS/SPI_CLK/I2C_SCL | Hi-Z, pulled up to 3.3 V | Out, Target UART Clear-To-Send Handshake input | Out, Target UART Clear-To-Send Handshake input |
11 | RST | Out, VCC | Out, RST | Ground |
12 | UART_TXD/SPI_SOMI/I2C_SDA | Hi-Z, pulled up to 3.3 V | In, Target UART TXD output | In, Target UART TXD output |
13 | UART_RTS | Hi-Z, pulled up to 3.3 V | In, Target UART Ready-to-Send Handshake output | In, Target UART Ready-to-Send Handshake output |
14 | UART_RXD/SPI_SIMO | Hi-Z, pulled up to 3.3 V | Out, Target UART RXD input | Out, Target UART RXD input |
NOTE
To enable the UART, I2C, or SPI pins, the correct invalid baud rate activation command must be sent (see Table 5 and Table 6). After this, the pins switch to the states in Table 8.
NOTE
MSP430BSL-SPI support is currently not available using the MSP-FET. The pin names used in Table 8 are the same as the names that are printed on the back of the MSP-FET.