tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 262

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

17.5 Transfer Modes
17. Synchronous Serial Interface (SIO)
RA001
SIO0CR<SIOS>
SIO0CR<SIOM>
SIO0SR<SIOF>
SIO0SR<SEF>
SIO0SR<TBFL>
SO0 pin (output)
SCLK0 pin (input)
INTSIO0 interrupt request
SIO0BUF
Write to SIO0BUF
SIO0CR<SIOS>
SIO0CR<SIOM>
SIO0SR<SIOF>
SIO0SR<SEF>
SIO0SR<TBFL>
SO0 pin (output)
SCLK0 pin (input)
INTSIO0 interrupt request
SIO0BUF
Write to SIO0BUF
Figure 17-5 8-bit Transmit Mode (External Clock and Reserved Stop)
Figure 17-6 8-bit Transmit Mode (External Clock and Forced Stop)
Writing data A
Writing
Start operation
data A
Start operation
A
A
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit0 Bit1 Bit2
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit0 Bit1
Writing data B
Writing
data B
Data A
Data A
B
B
01
Writing
data C
If two pieces of data are written,
the latter data is effective
C
Page 248
Data C
Reserved stop
Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
Data B
01
Data is not held but
becomes the H level
When the operation is restarted
after a forced stop, the last data
written to the buffer is transmitted.
00
Writing data C
C
Start operation
Reserved stop
transmission in case of reserved stop
the current level in the operation
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
An interrupt is generated after
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5
Stopped while keeping
with an external clock
Returned to the H level by setting
Writing
data D
Reserved stop
01
Data C
Data C
D
SIOCR1<SIOM> to “00”
Forced stop has priority
over reserved stop
Forced stop
TMP89FM42
00
00