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參數(shù)資料
| 型號： | X9525V20I |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules |
| 中文描述： | DUAL 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 13/26頁 |
| 文件大小： | 578K |
| 代理商： | X9525V20I |
13
FN8210.0
March 10, 2005
The region of EEPROM memory which is protected /
locked is determined by the combination of the BL1 and
BL0 bits written to the CONSTAT register. It is possible
to lock the regions of EEPROM memory shown in the
table below:
If the user attempts to perform a write operation on a pro-
tected region of EEPROM memory, the operation is
aborted without changing any data in the array.
When the Block Lock bits of the CONSTAT register are
set to something other than BL1 = 0 and BL0 = 0, then
the “wiper position” of the DCPs cannot be changed - i.e.
DCP write operations cannot be conducted:
The factory default setting for these bits are BL1 = 0,
BL0 = 0.
IMPORTANT NOTE: If the Write Protect (WP) pin of the
X9525 is active (HIGH), then all nonvolatile write opera-
tions to both the EEPROM memory and DCPs are inhib-
ited, irrespective of the Block Lock bit settings (See "WP:
Write Protection Pin").
CONSTAT Register Write Operation
The CONSTAT register is accessed using the Slave
Address set to 1010A
0
10 (Refer to Figure 4.). Following
the Slave Address Byte, access to the CONSTAT regis-
ter requires an Address Byte which must be set to FFh.
Only one data byte is allowed to be written for each
CONSTAT register Write operation. The user must issue
a STOP, after sending this byte to the register, to initiate
the nonvolatile cycle that stores the BP1and BP0 bits.
The X9525 will not ACKNOWLEDGE any data bytes
written after the first byte is entered (Refer to Figure 18.).
When writing to the CONSTAT register, the bits CS7-
CS5 and CS0 must all be set to “0”. Writing any other bit
sequence to bits CS7-CS5 and CS0 of the CONSTAT
register is reserved.
Prior to writing to the CONSTAT register, the WEL and
RWEL bits must be set using a two step process, with
the whole sequence requiring 3 steps
—Write a 02H to the CONSTAT Register to set the Write
Enable Latch (WEL). This is a volatile operation, so
there is no delay after the write. (Operation preceded
by a START and ended with a STOP).
—Write a 06H to the CONSTAT Register to set the Reg-
ister Write Enable Latch (RWEL) AND the WEL bit.
This is also a volatile cycle. The zeros in the data byte
are required. (Operation preceded by a START and
ended with a STOP).
—Write a one byte value to the CONSTAT Register that
has all the bits set to the desired state. The CONSTAT
register can be represented as 000st010 in binary,
where st are the Block Lock Protection (BL1 and BL0)
bits. This operation is proceeded by a START and
ended with a STOP bit. Since this is a nonvolatile write
cycle, it will typically take 5ms to complete. The RWEL
bit is reset by this cycle and the sequence must be
repeated to change the nonvolatile bits again. If bit 2 is
set to ‘1’ in this third step (000s t110) then the RWEL
bit is set, but the BL1 and BL0 bits remain unchanged.
Writing a second byte to the control register is not
allowed. Doing so aborts the write operation and the
X9525 does not return an ACKNOWLEDGE.
BL1 BL0
0
0
1
1
Protected Addresses
(Size)
None (Default)
C0h - FFh
(64 bytes
)
80h - FFh
(128 bytes
)
00h - FFh
(256 bytes)
Partition of array
locked
None (Default)
Upper 1/4
Upper 1/2
All
0
1
0
1
BL1
0
0
1
1
BL0
0
1
0
1
DCP Write Operation Permissible
YES (Default)
NO
NO
NO
S
T
A
R
T
1
0
1
0
1
0
R/W A
C
K
1
1
1
1
1
1
1
1
A
C
K
SCL
SDA
S
T
O
P
A
C
K
CS7 CS6CS5 CS4 CS3 CS2CS1 CS0
SLAVE ADDRESS BYTE
ADDRESS BYTE
CONSTAT REGISTER DATA IN
Figure 18. CONSTAT Register Write Command Sequence
A
0
X9525
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X9525V20IT1 | 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅動器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:激光二極管驅動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應商設備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9525V20IZ | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9530 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Temperature Compensated Laser Diode Controller |
| X9530_0511 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Temperature Compensated Laser Diode Controller |
| X9530B15I | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Temperature Compensated Laser Diode Controller |
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