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參數資料
型號: SE97BTP,547
廠商: NXP Semiconductors
文件頁數: 19/53頁
文件大小: 386K
描述: IC TEMP SENSOR DIMM 8HWSON
產品培訓模塊: I²C Bus Fundamentals
特色產品: NXP - I2C Interface
標準包裝: 1
功能: 溫度監控系統(傳感器),DIMM DDR 內存
傳感器類型: 內部
感應溫度: -40°C ~ 125°C
精確度: ±3°C(最小值)
拓撲: ADC(三角積分型),比較器,寄存器庫
輸出類型: I²C?/SMBus?
輸出警報:
輸出風扇:
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-WFDFN 裸露焊盤
供應商設備封裝: 8-WSON
包裝: 標準包裝
產品目錄頁面: 847 (CN2011-ZH PDF)
其它名稱: 568-5055-6
SE97B_1
?NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 01  27 January 2010
19 of 53
NXP Semiconductors
SE97B
DDR memory module temp sensor with integrated SPD
7.10.2.2   Reversible Write Protection (RWP) and Clear Reversible Write Protection (CRWP)
If the software write-protection has been set with the RWP instruction, it can be cleared
again with a CRWP instruction.
The two instructions, RWP and CRWP have the same format as a Byte Write instruction,
but with a different setting for the hardware address pins (as shown in Table 6
). Like the
Byte Write instruction, it is followed by an address byte and a data byte, but in this case
the contents are all Dont Care (Figure 13
). Another difference is that the voltage, V
I(ov)
,
must be applied on the A0 pin, and specific logical levels must be applied on the other two
(A1 and A2), as shown in Table 6
.
 
7.10.2.3   Read Permanent Write Protection (RPWP), Read Reversible Write Protection
(RRWP), and Read Clear Reversible Write Protection (RCRWP)
Read PWP, RWP, and CRWP allow the SE97B to be read in write protection mode. The
instruction format is the same as that of the write protection except that the 8
th
 bit, R/W
, is
set to 1. Figure 14
 shows the instruction format, while Table 8
 shows the responses when
the instructions are issued.
 
Table 7.
Acknowledge when writing data or defining write protection
Instructions with R/W
 bit = 0.
Status
Instruction
ACK
Address
ACK
Data byte
ACK
Write cycle
(t
W
)
Permanently
protected
PWP, RWP or CRWP
NACK
not significant
NACK
not significant
NACK
no
page or byte write in
lower 128 bytes
ACK
address
ACK
data
NACK
no
Protected with
RWP
RWP
NACK
not significant
NACK
not significant
NACK
no
CRWP
ACK
not significant
ACK
not significant
ACK
yes
PWP
ACK
not significant
ACK
not significant
ACK
yes
page or byte write in
lower 128 bytes
ACK
address
ACK
data
NACK
no
Not protected
PWP or RWP
ACK
not significant
ACK
not significant
ACK
yes
CRWP
ACK
not significant
ACK
not significant
ACK
no
page or byte write
ACK
address
ACK
data
ACK
yes
Table 8.
Acknowledge when reading the write protection
Instructions with R/W
 bit = 1.
Status
Instruction
ACK
Address
ACK
Data byte
ACK
Permanently
protected
RPWP, RRWP or
RCRWP
NACK
not significant
NACK
not significant
NACK
Protected with
RWP
RRWP
NACK
not significant
NACK
not significant
NACK
RCRWP
ACK
not significant
NACK
not significant
NACK
RPWP
ACK
not significant
NACK
not significant
NACK
Not protected
RPWP, RRWP or
RCRWP
ACK
not significant
NACK
not significant
NACK
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