์ „์ž๋ถ€ํ’ˆ ๋ฐ์ดํ„ฐ์‹œํŠธ ๊ฒ€์ƒ‰์—”์ง„
  Korean  โ–ผ

Delete All
ON OFF
ALLDATASHEET.CO.KR

X  

Preview PDF Download HTML

S71WS512NC0BAWE70 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 64 Page - SPANSION

๋ถ€ํ’ˆ๋ช… S71WS512NC0BAWE70
์ƒ์„ธ๋‚ด์šฉ  Stacked Multi-Chip Product (MCP)
Download  188 Pages
Scroll/Zoom Zoom In 100% Zoom Out
์ œ์กฐ์‚ฌ  SPANSION [SPANSION]
ํ™ˆํŽ˜์ด์ง€  http://www.spansion.com
Logo 

S71WS512NC0BAWE70 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 64 Page - SPANSION

Zoom Inzoom in Zoom Outzoom out
/ 188 page
 64 / 188 page
background image
62
S71WS-Nx0 Based MCPs
S71WS-N_01_A4 September 15, 2005
Ad van c e
Inf o rmation
Figure 11.2 contains all possible combinations of the DYB, PPB, and PPB Lock Bit relating to the
status of the sector. In summary, if the PPB Lock Bit is locked (set to โ€œ0โ€), no changes to the PPBs
are allowed. The PPB Lock Bit can only be unlocked (reset to โ€œ1โ€) through a hardware reset or
power cycle. See also Figure 11.1 for an overview of the Advanced Sector Protection feature.
11.6
Hardware Data Protection Methods
The device offers two main types of data protection at the sector level via hardware control:
When WP# is at VIL, the four outermost sectors are locked (device specific).
When ACC is at VIL, all sectors are locked.
There are additional methods by which intended or accidental erasure of any sectors can be pre-
vented via hardware means. The following subsections describes these methods:
11.6.1
WP# Method
The Write Protect feature provides a hardware method of protecting the four outermost sectors.
This function is provided by the WP# pin and overrides the previously discussed Sector Protec-
tion/Unprotection method.
If the system asserts VIL on the WP# pin, the device disables program and erase functions in the
โ€œoutermostโ€ boot sectors. The outermost boot sectors are the sectors containing both the lower
and upper set of sectors in a dual-boot-configured device.
If the system asserts VIH on the WP# pin, the device reverts to whether the boot sectors were
last set to be protected or unprotected. That is, sector protection or unprotection for these sectors
depends on whether they were last protected or unprotected.
Note that the WP# pin must not be left floating or unconnected as inconsistent behavior of the
device may result.
The WP# pin must be held stable during a command sequence execution
11.6.2
ACC Method
This method is similar to above, except it protects all sectors. Once ACC input is set to VIL, all
program and erase functions are disabled and hence all sectors are protected.
11.6.3
Low VCC Write Inhibit
When VCC is less than VLKO, the device does not accept any write cycles. This protects data during
VCC power-up and power-down.
Table 11.2 Advanced Sector Protection Software Examples
Unique Device PPB Lock Bit
0 = locked
1 = unlocked
Sector PPB
0 = protected
1 = unprotected
Sector DYB
0 = protected
1 = unprotected
Sector Protection Status
Any Sector
0
0
x
Protected through PPB
Any Sector
0
0
x
Protected through PPB
Any Sector
0
1
1
Unprotected
Any Sector
0
1
0
Protected through DYB
Any Sector
1
0
x
Protected through PPB
Any Sector
1
0
x
Protected through PPB
Any Sector
1
1
0
Protected through DYB
Any Sector
1
1
1
Unprotected


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


๋ฐ์ดํ„ฐ์‹œํŠธ Download




๋งํฌ URL



Privacy Policy
ALLDATASHEET.CO.KR
ALLDATASHEET ๊ฐ€ ๊ท€ํ•˜์— ๋„์›€์ด ๋˜์…จ๋‚˜์š”?  [ DONATE ]  

Alldatasheet๋Š”?   |   ๊ด‘๊ณ ๋ฌธ์˜    |   ์šด์˜์ž์—๊ฒŒ ์—ฐ๋ฝํ•˜๊ธฐ   |   ๊ฐœ์ธ์ •๋ณด์ทจ๊ธ‰๋ฐฉ์นจ   |   ์ฆ๊ฒจ์ฐพ๊ธฐ   |   ๋งํฌ๊ตํ™˜   |   ์ œ์กฐ์‚ฌ๋ณ„ ๊ฒ€์ƒ‰
All Rights Reservedยฉ 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