データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

Preview PDF HTML

SH7708 データシート(PDF) 239 Page - Renesas Technology Corp

部品番号 SH7708
部品情報  SuperH??RISC engine
PDF  633 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  RENESAS [Renesas Technology Corp]
ホームページ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7708 データシート(HTML) 239 Page - Renesas Technology Corp

Back Button SH7708 Datasheet HTML 235Page - Renesas Technology Corp SH7708 Datasheet HTML 236Page - Renesas Technology Corp SH7708 Datasheet HTML 237Page - Renesas Technology Corp SH7708 Datasheet HTML 238Page - Renesas Technology Corp SH7708 Datasheet HTML 239Page - Renesas Technology Corp SH7708 Datasheet HTML 240Page - Renesas Technology Corp SH7708 Datasheet HTML 241Page - Renesas Technology Corp SH7708 Datasheet HTML 242Page - Renesas Technology Corp SH7708 Datasheet HTML 243Page - Renesas Technology Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 239 / 633 page
background image
221
Bit:
15
14
13
12
11
10
9
8
Bit name:
—
—
—
—
—
—
—
—
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
Bit name:
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
10.2.11
Refresh Time Constant Register (RTCOR)
The refresh time constant register (RTCOR) is a 16-bit read/write register. The values of RTCOR
and RTCNT (lower 8 bits) are constantly compared. When the values match, 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 and the refresh mode is set to CAS-before-
RAS refresh, a memory refresh cycle occurs when the CMF bit is set. RTCOR is initialized to
H'00 by a power-on reset. It is not initialized by a manual reset or in standby mode, but retains its
contents.
Note:
The method for writing to RTCOR is different from that for general registers to prevent
inadvertent overwriting. Using a word transfer instruction, place B'10100101 in the upper
byte and the write data in the lower byte. For details, see section 10.2.13, Cautions on
Accessing Refresh Control Related Registers.
Bit:
15
14
13
12
11
10
9
8
Bit name:
—
—
—
—
—
—
—
—
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
Bit name:
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
10.2.12
Refresh Count Register (RFCR)
The refresh count register (RFCR) is a 16-bit read/write register containing a 10-bit counter that
increments every time RTCOR and RTCNT match. When RFCR exceeds the count limit value set



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


データシート ダウンロード

Go To PDF Page


リンク URL



ALLDATASHEETはお客様のビジネスに役立ちますか？  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   データシートへのリンク    |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com