tmp86c847iug TOSHIBA Semiconductor CORPORATION, tmp86c847iug Datasheet - Page 120

• Manufacturer Part Number: tmp86c847iug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

10.3 Function
10. Synchronous Serial Interface (SIO)
SIOCR1<SIOS>
SIOSR<SIOF>
SIOSR<SEF>
SCK
SI pin
SIOSR<RXF>
INTSIO
interrupt
request
SIORDB
pin
Figure 10-11 Example of External Clock and MSB Receive Mode
(4)
the received data is ignored while the SIOSR<RXERR> is “1”.
Receive error processing
Receive errors occur on the following situation. To protect SIORDB and the shift register contents,
• Shift operation is finished before reading out received data from SIORDB at SIOSR<RXF>
is “1” in an external clock operation.
If receive error occurs, set the SIOCR1<SIOS> to “0” for reading the data that received
immediately before error occurrence. And read the data from SIORDB. Data in shift register
(at errors occur) can be read by reading the SIORDB again.
When SIOSR<RXERR> is cleared to “0” after reading the received data, SIOSR<RXF> is
cleared to “0”.
After clearing SIOCR1<SIOS> to “0”, when 8-bit serial clock is input to
operation is stopped. To restart the receive operation, confirm that SIOSR<SIOF> is cleared
to “0”.
If the receive error occurs, set the SIOCR1<SIOINH> to “1” for stopping the receive opera-
tion immediately. In this case, SIOCR1<SIOS>, SIOSR register, SIORDB register and
SIOTDB register are initialized.
A7 A6
Start shift
operation
A5 A4 A3 A2 A1 A0 B7 B6 B5 B4 B3 B2 B1 B0 C7 C6 C5 C4 C3 C2 C1 C0
Reading received
data A
Reading received data
A
Page 112
Start shift
operation
B
Start shift
operation
Reading received
data B
Clearing SIOS
Reading received
data C
C
SCK
TMP86C847IUG
pin, receive