Master, Slave

Select the transfer mode.

Master

Operates this window as a master.

Setting of [Transfer Clock] is required for generating the clock during communication.

Slave

Operates this window as a slave (default).

Communication is performed using the clock of the serial interface provided in the CPU.

Transfer Clock

Directly input the transfer clock value (unit: kHz).

Values with decimals can also be set. This item must be set when master is selected.

Transfer Direction

Select the transfer direction.

MSB first

Sets MSB first as the transfer direction (default).

LSB first

Sets LSB first as the transfer direction.

Data bit length

Select the bit length of the transmission data from the drop-down list, or specify it through direct input (default: 8).

Data Phase

Select the transmission/reception timing to set the data phase. The data clock phase is set in combination with "Clock Phase" as shown in "Table A.15 Data Clock Phase Settings".

Normal

Transmits/receives data at the normal 3-wire serial transmission/reception timing (default).

Precede

Transmits/receives data at a timing half a clock of the operation clock earlier than the normal 3-wire serial transmission/reception timing.

Clock Phase

Select the transmission/reception clock waveform to set the clock phase. The data clock phase is set in combination with "Data Phase" as shown in "Table A.15 Data Clock Phase Settings".

Normal

Operates on the normal 3-wire serial clock.

Transfer starts at the falling edge of the clock (default).

Reverse

Operates on the reverse clock of the normal 3-wire serial clock. Transfer starts at the rising edge of the clock.

Connect to SCK

Select the pin for use in the input and output of a serial clock to the microcontroller from the drop-down list.Note

Transmit to SI

Select the pin for use in the input of serial data to the microcontroller from the drop-down list.Note

If you will not be using this item, select “Unused”.

Receive from SO

Select the pin for use in the output of serial data on the microcontroller from the drop-down list.Note

If you will not be using this item, select “Unused”.

Repeat

Select this item to repeat data transfer when the [Auto Send] button in the Serial window has been clicked.

Following transmission of the last data during automatic transmission, returns to the beginning of the data and performs automatic transmission.

Following transmission of the last data during automatic transmission, stops transmission.

Note

When the port pin to which a multiplexed pin function is assigned in the peripheral I/O redirection register is to be changed, select the pin in accord with the settings. If the selected pin does not correspond to the settings of the peripheral I/O redirection register, data will not be correctly sent and received in the Serial window.

Remark

For the selectable range, see the user's manual of the microcontroller that is used.

Table A.15

Data Clock Phase Settings

Data Phase

Clock Phase

Data Clock Phase

Normal

Normal

Precede

Normal

Normal

Reverse

Precede

Reverse