Fujitsu MB90335 Series Hardware Manual page 394

MB90335 Series
[bit2] BDS: Bit Direction Selection (transfer direction selection)
On input and output of the serial data, Select either of the following alternatives: transfer in ascending
order from the least significant bit (LSB first); transfer in descending order from the most significant bit
(MSB first).
BDS
0
1
• This bit is initialized to "0" at reset.
• This bit can be read and written.
Note:
Select transfer direction before writing data to SDR.
[bit1] SOE: Serial Out Enable (serial output permission)
Controls the external pin (SOT) for serial I/O.
SOE
0
1
• This bit is initialized to "0" at reset.
• This bit can be read and written.
[bit0] SCOE: SCk1 Output Enable (shift clock output enable)
Controls output of the input/output external pins (SCK1,SCK2) for shift clock.
SCOE
0
1
Set this bit to "0", when you transfer data in external shift clock mode for each individual instruction.
• Initialized to "0" at reset.
• This bit can be read and written.
CM44-10137-6E
General-purpose port [Initial value]
At the transfer by general-purpose port pin and instruction
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 17 EXTENDED I/O SERIAL INTERFACE
17.2 Register in Extended I/O Serial Interface
Operation
LSB first [Initial value]
MSB first
Operation
Serial data output
Operation
Shift clock output pin
[Initial value]
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