tmp86c847iug TOSHIBA Semiconductor CORPORATION, tmp86c847iug Datasheet - Page 124
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tmp86c847iug
Manufacturer Part Number
tmp86c847iug
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP86C847IUG.pdf
(160 pages)
- Current page: 124 of 160
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10.3 Function
10. Synchronous Serial Interface (SIO)
SI pin
SIOCR1<SIOS>
SIOSR<SIOF>
SIOSR<SEF>
SCK
SO pin
INTSIO
interrupt
request
SIOSR<TXF>
SIOTDB
SIOSR<RXF>
SIORDB
pin output
Figure 10-14 Example of External Clock and MSB Transmit/Receive Mode
(4)
errors occur transmits or receives.
Writing transmit
data A
Transmit/receive error processing
Transmit/receive errors occur on the following situation. Corrective action is different, which
(a) Transmit errors
A
Transmit errors occur on the following situation.
• Shift operation starts before writing next transmit data to SIOTDB in external clock op-
A7 A6
D7 D6 D5 D4 D3 D2 D1 D0 E7 E6 E5 E4 E3 E2 E1 E0 F7 F6 F5 F4 F3 F2 F1 F0
eration.
If transmit errors occur during transmit operation, SIOSR<TXERR> is set to “1” imme-
diately after starting shift operation. And INTSIO interrupt request is generated after all
of the 8-bit data has been received.
If shift operation starts before writing data to SIOTDB after SIOCR1<SIOS> is set to
“1”, SIOSR<TXERR> is set immediately after starting shift operation. And INTSIO in-
terrupt request is generated after all of the 8-bit data has been received.
SO pin is kept in high level when SIOSR<TXERR> is set to “1”. When transmit error
occurs, transmit operation must be forcibly stop by writing SIOCR1<SIOINH> to “1”
after the received data is read from SIORDB. In this case, SIOCR1<SIOS>, SIOSR reg-
ister, SIORDB register and SIOTDB register are initialized.
Writing transmit data
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 D
Writing transmit
data B
Reading received data
Page 116
D
B
Start shift
operation
Writing transmit
data C
Reading received
data E
E
C
Start shift
operation
Clearing SIOS
Reading received
data F
F
TMP86C847IUG
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