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| 型號(hào)： | X9523V20I-A |
| 廠商： | INTERSIL CORP |
| 元件分類(lèi)： | 數(shù)字電位計(jì) |
| 英文描述： | Laser Diode Control for Fiber Optic Modules |
| 中文描述： | DIGITAL POTENTIOMETER, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 8/30頁(yè) |
| 文件大?。?/td> | 509K |
| 代理商： | X9523V20I-A |
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8
FN8209.0
March 10, 2005
WCR and NVM. Therefore, the new “wiper position” set-
ting is recalled into the WCR after V1/Vcc of the X9523
has been powered down then powered back up.
If WT is “0” then a DCP Volatile Write is performed. This
operation changes the DCP “wiper position” by writing
new data to the associated WCR only. The contents of
the associated NVM register remains unchanged. There-
fore, when V1/Vcc to the device is powered down then
back up, the “wiper position” reverts to that last written to
the DCP using a nonvolatile write operation.
DCP Write Operation
A write to DCPx (x = 1,2) can be performed using the
three byte command sequence shown in Figure 9.
In order to perform a write operation on a particular DCP,
the Write Enable Latch (WEL) bit of the CONSTAT Reg-
ister must first be set (See “WEL: Write Enable Latch
(Volatile)” on page 10.).
The Slave Address Byte 10101110 specifies that a Write
to a DCP is to be conducted. An ACKNOWLEDGE is
returned by the X9523 after the Slave Address, if it has
been received correctly.
Next, an Instruction Byte is issued on SDA. Bits P1 and
P0 of the Instruction Byte determine which WCR is to be
written, while the WT bit determines if the Write is to be
volatile or nonvolatile. If the Instruction Byte format is
valid, another ACKNOWLEDGE is then returned by the
X9523.
Following the Instruction Byte, a Data Byte is issued to
the X9523 over SDA. The Data Byte contents is latched
into the WCR of the DCP on the first rising edge of the
clock signal, after the LSB of the Data Byte (D0) has
been issued on SDA (See Figure 29).
The Data Byte determines the “wiper position” (which
FET switch of the DCP resistive array is switched ON) of
the DCP. The maximum value for the Data Byte depends
upon which DCP is being addressed (see Table below).
Using a Data Byte larger than the values specified above
results in the “wiper terminal” being set to the highest tap
position. The “wiper position” does NOT roll-over to the
lowest tap position.
For DCP2 (256 Tap), the Data Byte maps one to one to
the “wiper position” of the DCP “wiper terminal”. There-
fore, the Data Byte 00001111 (15
10
) corresponds to set-
ting the “wiper terminal” to tap position 15. Similarly, the
Data Byte 00011100 (28
10
) corresponds to setting the
“wiper terminal” to tap position 28. The mapping of the
Data Byte to “wiper position” data for DCP1 (100 Tap), is
shown in “APPENDIX 1”. An example of a simple C lan-
guage function which “translates” between the tap posi-
tion (decimal) and the Data Byte (binary) for DCP1, is
given in “APPENDIX 2”.
WT
Description
0
Select a Volatile Write operation to be performed
on the DCP pointed to by bits P1 and P0
Select a Nonvolatile Write operation to be per-
formed on the DCP pointed to by bits P1 and P0
1
0
0
WT
0
0
0
P1
P0
WRITE TYPE
DCP SELECT
This bit has no effect when a Read operation is being performed.
I5
I6
I7
I4
I3
I2
I1
I0
Figure 8.
Instruction Byte Format
S
T
A
R
T
1
0
1
0
1
1
1
0
A
C
K
WT
0
0
0
0
0
P1 P0
A
C
K
S
T
O
P
A
C
K
D7
D6
D5
D4
D3
D2
D1
D0
SLAVE ADDRESS BYTE
INSTRUCTION BYTE
DATA BYTE
Figure 9.
DCP Write Command Sequence
P1- P0
0
0
1
1
DCPx
# Taps
Max. Data Byte
0
1
0
1
RESERVED
100
256
RESERVED
x = 1
x = 2
Refer to Appendix 1
FFh
X9523
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X9523V20I-AT1 | 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類(lèi)型:激光二極管驅(qū)動(dòng)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(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤(pán) 安裝類(lèi)型:表面貼裝 |
| X9523V20I-B | 功能描述:IC DUAL DCP LASER CNTRL 20TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類(lèi)型:激光二極管驅(qū)動(dòng)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(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤(pán) 安裝類(lèi)型:表面貼裝 |
| X9523V20I-BT1 | 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類(lèi)型:激光二極管驅(qū)動(dòng)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(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤(pán) 安裝類(lèi)型:表面貼裝 |
| X9523V20IZ-A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Diode Control for Fiber Optic Modules |
| X9523V20IZ-B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Diode Control for Fiber Optic Modules |
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