TMP86FS49AIUG datasheet(180/296 Pages) TOSHIBA

180 / 296 page

Page 164

14. Synchronous Serial Interface (SIO1)

14.3 Function

TMP86FS49AIUG

14.3.2 Transfer bit direction

Transfer data direction can be selected by using SIO1CR<SIODIR>. The transfer data direction can't be set

individually for transmit and receive operations.

When the data direction is changed, the writing instruction to SIO1CR<SIODIR> should be executed while

the transfer is stopped (when SIO1SR<SIOF>= “0”)

Figure 14-5 Transfer Bit Direction (Example of transmit mode)

14.3.2.1 Transmit mode

(1)

MSB transmit mode

MSB transmit mode is selected by setting SIO1CR<SIODIR> to “0”, in which case the data is

transferred sequentially beginning with the most significant bit (Bit7).

(2)

LSB transmit mode

LSB transmit mode is selected by setting SIO1CR<SIODIR> to “1”, in which case the data is

transferred sequentially beginning with the least significant bit (Bit0).

14.3.2.2 Receive mode

(1)

MSB receive mode

MSB receive mode is selected by setting SIO1CR<SIODIR> to “0”, in which case the data is

received sequentially beginning with the most significant bit (Bit7).

(b) LSB transfer

(a) MSB transfer

Shift out

SIO1CR<SIOS>

SCK1

SIO1TDB

SO1 pin

SIO1CR<SIOS>

SCK1

SIO1TDB

SO1 pin

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