Section 16 Serial I/O (SIO)
Rev. 2.00 Mar 09, 2006 page 674 of 906
REJ09B0292-0200
Bit 1—Transmit Data Register Empty (TDRE): Flag that indicates that the SITDR register is
empty and the next data can be written.
Bit 1: TDRE
Description
0
SITDR transmit data is valid
[Clearing conditions]
•
When 0 is written to the TDRE bit after reading TDRE = 1
•
When the DMAC writes data to SITDR
1
SITDR transmit data is invalid
(Initial value)
TDRE is set to 1 in the following cases:
•
When data is transferred from SITDR to SITSR
•
When the TE bit is cleared to 0 in the serial control register (SICTR)
•
When the processor enters the reset state
Bit 0—Receive Data Register Full (RDRF): Flag that indicates that SIRDR receive data is waiting.
Bit 0: RDRF
Description
0
SIRDR receive data is invalid
(Initial value)
[Clearing conditions]
•
When the DMAC reads data from SIRDR
•
When 1 is read from RDRF and 0 is written
•
When the RE bit is cleared to 0 in the serial control register (SICTR)
•
When the processor enters the reset state
1
SIRDR receive data is valid
RDRF is set to 1 when serial data reception ends normally and the data is
transferred from SIRSR to SIRDR
Содержание SH7616
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Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...