User`s manual

50
RS-232 Ports
SCIF Port Definition
RXD1/SCPT2 DTR (software controlled)
SCK1/SCPT3 CD (software controlled)
RxD2/SCPT4 Receive data (console, port 1)
TxD2/SCPT4 Transmit data (console, port 1)
SCI Port Definition
RxD0/SCPT0 Receive data (console, port 0)
TxD0/SCPT0 Transmit data (console, port 0)
SCIF Register Name Abbreviation R/W Initial Value Address Access Size
Serial mode register 2 SCSMR2 R/W H'00 H'4000150 8 bits
Bit rate register 2 SCBRR2 R/W H'FF H'4000152 8 bits
Serial control register 2 SCSCR2 R/W H'00 H'4000154 8 bits
Transmit FIFO data
register 2
SCFTDR2 W Write only H'4000156 8 bits
Serial status register 2 SCSSR2 R/(W) H'0060 H'4000158 16 bits
Receive data FIFO
register 2
SCFRDR2 R Undefined H'400015A 8 bits
FIFO control register 2 SCFCR2 R/W H'00 H'400015C 8 bits
FIFO data count set
register 2
SCFDR2 R H'0000 H'400015E 16 bits
SCI Register Name Abbreviation R/W Initial Value Address Access Size
Serial mode register SCSMR R/W H'00 H'FFFFFE80 8 bits
Bit rate register SCBRR R/W H'FF H'FFFFFE82 8 bits
Serial control register SCSCR R/W H'00 H'FFFFFE84 8 bits
Transmit data register SCFTDR W H'FF H'FFFFFE86 8 bits
Serial status register SCSSR R/(W) H'84 H'FFFFFE88 8 bits
Receive data register SCFRDR R H'00 H'FFFFFE8A 8 bits
Port SC data register SCPDR R/W H'00 H'4000136 8 bits
Port SC control register SCPCR R/W H'A888 H'4000116 16 bits
Note: For more information, refer to the SH7709A/7729 Hardware Manual, Serial
Communication Interface with FIFO (SCIF).
Key West Interrupts Operation
There are 21 sources of external interrupts on the Key West Board. The status of any of these
external interrupts can be seen by viewing the Interrupt Status Register ISTAT, and the Interrupt
Mask Register IMASK. ISTAT contains the present status of the interrupt sources, and IMASK is
a writeable register which determines whether an interrupt source is masked (default) or unmasked.