MC96F6432
228 June 22, 2018 Ver. 2.9
USI0CR3 (USI0 Control Register 3: For UART, SPI, and I2C mode) : DBH
Initial value : 00H
Selects master or slave in SPI and synchronous mode operation and
controls the direction of SCK0 pin
Slave mode operation (External clock for SCK0).
Master mode operation(Internal clock for SCK0).
Controls the loop back mode of USI0 for test mode (only UART and SPI
mode)
In synchronous mode of operation, selects the waveform of SCK0 output
ACK is free-running while UART is enabled in synchronous
master mode
ACK is active while any frame is on transferring
This bit controls the SS0 pin operation (only SPI mode)
Enable (The SS0 pin should be a normal input)
SPI port function exchange control bit (only SPI mode)
Exchange MOSI0 and MISO0 function
Selects the length of stop bit in asynchronous or synchronous mode of
operation.
The ninth bit of data frame in asynchronous or synchronous mode of
operation. Write this bit first before loading the USI0DR register
MSB (9
th
bit) to be transmitted is ‘0’
MSB (9
th
bit) to be transmitted is ‘1’
The ninth bit of data frame in asynchronous or synchronous mode of
operation. Read this bit first before reading the receive buffer (only UART
mode).
MSB (9
th
bit) received is ‘0’
MSB (9
th
bit) received is ‘1’