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參數(shù)資料
| 型號： | X9521V20I |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Fiber Channel/Gigabit Ethernet Laser Diode Control for Fiber Optic Modules |
| 中文描述： | DUAL 100K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 8/26頁 |
| 文件大?。?/td> | 434K |
| 代理商： | X9521V20I |
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REV 1.1.9 1/30/03
Characteristics subject to change without notice.
8 of 26
www.xicor.com
X9521
– Preliminary Information
“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” .
It should be noted that all writes to any DCP of the X9521
are random in nature. Therefore, the Data Byte of consec-
utive write operations to any DCP can differ by an arbi-
trary number of bits. Also, setting the bits (P1=0, P0=0) or
(P1=1, P0=1) are reserved sequences, and will result in
no ACKNOWLEDGE after sending an Instruction Byte on
SDA.
The factory default setting of all “wiper position” settings is
with 00h stored in the NVM of the DCPs. This corre-
sponds to having the “wiper teminal”
R
WX
(x=1,2) at the
“l(fā)owest” tap position, Therefore, the resistance between
R
WX
and
R
LX
is a minimum (essentially only the Wiper
Resistance,
R
W
).
DCP Read Operation
A read of DCPx (x=1,2) can be performed using the three
byte random read command sequence shown in Figure
10.
The master issues the START condition and the Slave
Address Byte 10101110 which specifies that a “dummy”
write” is to be conducted. This “dummy” write operation
sets which DCP is to be read (in the preceding Read
operation). An ACKNOWLEDGE is returned by the
X9521 after the Slave Address if received correctly. Next,
an Instruction Byte is issued on SDA. Bits P1-P0 of the
Instruction Byte determine which DCP “wiper position” is
to be read. In this case, the state of the WT bit is “don’t
care”. If the Instruction Byte format is valid, then another
ACKNOWLEDGE is returned by the X9521.
Following this ACKNOWLEDGE, the master immediately
issues another START condition and a valid Slave
address byte with the R/W bit set to 1. Then the X9521
issues an ACKNOWLEDGE followed by Data Byte, and
Slave
Address
Instruction
Byte
A
C
K
A
C
K
S
t
a
r
t
S
t
o
p
Slave
Address
Data Byte
A
C
K
S
t
a
r
t
SDA Bus
Signals from
the Slave
Signals from
the Master
Figure 10. DCP Read Sequence
“Dummy” write
READ Operation
101 111
0
00 00
W
T
P
1
P
0
101 111
1
WRITE Operation
-
MSB
LSB
DCPx
x = 1
x = 2
“-” = DON’T CARE
S
t
a
r
t
S
t
o
p
Slave
Address
Address
Byte
Data
Byte
A
C
K
A
C
K
A
C
K
SDA Bus
Signals from
the Slave
Signals from
the Master
Figure 11. EEPROM Byte Write Sequence
Internal
Device
Address
1 0 1 0 0 00
0
WRITE Operation
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X9521V20I-A | 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 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:- 類型:激光二極管驅(qū)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(diào)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(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9521V20I-B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9521V20IZ-A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9521V20IZ-B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9522 | 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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