Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 278 of 906
REJ09B0292-0200
7.2.9
Refresh Timer Counter (RTCNT)
Bit:
15
14
13
12
11
10
9
8
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
Bit:
7
6
5
4
3
2
1
0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The 8-bit counter RTCNT counts up with input clocks. The clock select bit of RTCSR selects an
input clock. RTCNT values can always be read/written by the CPU. When RTCNT matches
RTCOR, RTCNT is cleared. Returns to 0 after it counts up to 255.
Bits 15 to 8—Reserved: These bits are always read as 0. The write value should always be 0.
7.2.10
Refresh Time Constant Register (RTCOR)
Bit:
15
14
13
12
11
10
9
8
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
Bit:
7
6
5
4
3
2
1
0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCOR is an 8-bit read/write register. The values of RTCOR and RTCNT are constantly
compared. When the values correspond, the compare match flag (CMF) in RTCSR is set and
RTCNT is cleared to 0. When the refresh bit (RFSH) in the individual memory control register
(MCR) is set to 1, a refresh request signal occurs. The refresh request signal is held until refresh
operation is actually performed. If the refresh request is not processed before the next match, the
previous request becomes ineffective.
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 ...