Section 14 Serial Communication Interface with FIFO (SCIF)
Rev. 2.00 Mar 09, 2006 page 630 of 906
REJ09B0292-0200
14.4
SCIF Interrupt Sources and the DMAC
The SCIF has four interrupt sources: the break interrupt (BRI) request, receive-error interrupt
(ERI) request, receive-FIFO-data-full interrupt (RXI) request, and transmit-FIFO-data-empty
interrupt (TXI) request.
Table 14.13 shows the interrupt sources and their relative priorities. The interrupt sources can be
enabled or disabled with the TIE or RIE bit in SCSCR. Each kind of interrupt request is sent to the
interrupt controller independently.
When the TDFE flag is set to 1 in the serial status 1 register (SC1SSR), a TXI interrupt is
requested. A TXI interrupt request can activate the DMAC to perform data transfer. The TDFE bit
is cleared to 0 automatically when all writes to the transmit FIFO data register (SCFTDR) by the
DMAC are completed.
When the RDF flag is set to 1 in SC1SSR, an RXI interrupt is requested. An RXI interrupt request
can activate the DMAC to perform data transfer. The RDF bit is cleared to 0 automatically when
all receive FIFO data register (SCFRDR) reads by the DMAC are completed.
When the ER flag is set to 1, an ERI interrupt is requested. The DMAC cannot be activated by an
ERI interrupt request.
When the BRK flag is set to 1, a BRI interrupt is requested. The DMAC cannot be activated by a
BRI interrupt request.
A TXI interrupt indicates that transmit data can be written, and an RXI interrupt indicates that
there is receive data in SCFRDR.
Table 14.13 SCIF Interrupt Sources
Interrupt Source
Description
DMAC
Activation
Priority on
Reset Release
ERI
Receive error (ER)
Not possible
High
RXI
Receive data full (RDF) or data ready (DR)
Possible
(RDF only)
↑
BRI
Break (BRK)
Not possible
↓
TXI
Transmit data FIFO empty (TDFE)
Possible
Low
Summary of Contents for SH7616
Page 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Page 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Page 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Page 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Page 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Page 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Page 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Page 935: ...SH7616 Hardware Manual ...