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TOSHIBA
SERIAL PORTS (SIO)
12
12.1
Features
Non-synchronous serial interface (all-dual RS-232C protocol) controllers.
(1) Baud rate generator
(2) Modem flow control (CTS/RTS)
(3) FIFO (8 bits x eight steps)
(4) Multi-controller system support
12.2
Block Diagrams
Fig. 9-1 shows the SIO connection inside the TX3904 and Fig. 9-2 shows internal blocks of the
SIO.
IM-BUS I/F signal
System clock
SDMAREQ1*
SINTREQ1*
SDMAACK1*
IM-BUS I/F signal
System clock
SDMAREQ0*
SINTREQ0*
SDMAACK0*
TX3904
SIO1
SIO0
Fig. 12-1
SIO Connection inside TX3904
170
TMPR3904F Rev. 2.0
SOUT1
SIN1
RTS1*
CTS1*
SOUT0
SIN0
RTS0*
CTS0*
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