TMP86PM74AFG Datasheet, PDF (140/190 Pages) Toshiba Semiconductor – 8 Bit Microcontroller

12. Synchronous Serial Interface (SIO)
12.3 Function
TMP86PM74AFG
SCK pin
External SCK input
Last-byte transfer
SO pin
A7 A6 A5 A4 A3 A2 A1 A0 B7 B1 B0 C7 C6 C5 C4 C3 C2 C1 C0
SI pin
SIOS
SIOF
D7 D6 D5 D4 D3 D2 D1 D0 E7 E1 E0 F7 F6 F5 F4 F3 F2 F1 F0
SIOS = "1" causes the SIO
to start transferring.
SIOS = "0" causes the SIO
to stop transferring.
SIOS = "1" causes the SIO
to start transferring.
SEF
TXF
RXF
INTSIO
TXERR
Transmit data are written.
Transmit data
are written.
All data have been
read from SIOBUF.
INTSIO is accepted.
(In the INTSIO service routine,
clear SIOS to "0" and check
the TXERR flag.)
RXERR
After confirmation of SIOF = "0",
set SIOCR1 and SIOCR2 and then
write the transmit data to SIOBUF.
After reading received data from SIOBUF,
check a checksum or the like to see if the
received data are correct. Clear SIOINH to "0"
to halt the SIO and then write the transmit data
to SIOBUF after confirmation of SIOF = "0".
Figure 12-14 Transmit/Receive Mode Operation
(where 3 bytes are transferred on an external source clock)
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