JAJSFF4D May 2018 – December 2019 MSP430FR2153 , MSP430FR2155 , MSP430FR2353 , MSP430FR2355
PRODUCTION DATA.
The eUSCI modules are used for serial data communications (see Table 5-14). The eUSCI_A module supports either UART or SPI communications. The eUSCI_B module supports either SPI or I2C communications. Additionally, eUSCI_A supports automatic baud-rate detection and IrDA..
eUSCI_A0 | PIN | UART | SPI |
P1.7 | TXD | SIMO | |
P1.6 | RXD | SOMI | |
P1.5 | – | SCLK | |
P1.4 | – | STE | |
eUSCI_A1 | PIN | UART | SPI |
P4.3 | TXD or TXD | SIMO | |
P4.2 | RXD or RXD | SOMI | |
P4.1 | – | SCLK | |
P4.0 | – | STE | |
eUSCI_B0 | PIN | I2C | SPI |
P1.3 | SCL | SOMI | |
P1.2 | SDA | SIMO | |
P1.1 | – | SCLK | |
P1.0 | – | STE | |
eUSCI_B1 | PIN | I2C | SPI |
P4.7 | SCL | SOMI | |
P4.6 | SDA | SIMO | |
P4.5 | – | SCLK | |
P4.4 | – | STE |
The eUSCI_A1 can work as UART in inverting polarity mode by port settings (see Table 5-15). When PSEL = 01b, the normal UART or SPI mode is used. When PSEL = 10b, the inverted UART mode is enabled to transmit and receive data in inverted polarity. In this mode, eUSCI_A1 can also wake up the device from LPM3 by detecting a rising edge of start bit according the falling edge in normal mode.
eUSCI_A1 | PSEL = 01b | PSEL = 10b |
---|---|---|
P4.3 | TXD | TXD |
P4.4 | RXD | RXD |