Section 15 Serial I/O with FIFO (SIOF)
Rev. 2.00 Mar 09, 2006 page 651 of 906
REJ09B0292-0200
Bit 8—Transmit FIFO Data Register Reset (TFRST): Invalidates the transmit data in SITDR and
resets it to empty status. Also initializes the TERR and TDRE bits in SISTR.
Note that SICTR is not initialized, so transmitting continues if the TE bit is set to 1.
Bit 8: TFRST
Description
0
Reset disabled
(Initial value)
1
Reset enabled
Note: Reset status persists while this bit is set to 1. Clear this bit to 0 to cancel reset status.
Bit 7 to 4—Receive FIFO Watermark (RFWM3 to RFWM0): These bits are used to make
threshold settings, which are used to set the RDRF bit in SISTR.
When the amount of primary receive data in SIRDR is equal to or greater than the watermark
setting, as shown in the table below, the RDRF bit is set to 1.
Bit 7: RFWM3
Bit 6: RFWM2
Bit 5: RFWM1
Bit 4: RFWM0
Watermark setting
0
0
0
0
1
(Initial value)
1
2
1
0
3
1
4
1
0
0
5
1
6
1
0
7
1
8
1
0
0
0
9
1
10
1
0
11
1
12
1
0
0
13
1
14
1
0
15
1
16
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
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 ...