參數(shù)資料
型號(hào)： X9525B20I
廠商： INTERSIL CORP
元件分類： 數(shù)字電位計(jì)
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, BGA20
封裝： CSP-20
文件頁(yè)數(shù)： 11/26頁(yè)
文件大小： 578K
代理商： X9525B20I
11
FN8210.0
March 10, 2005
Random EEPROM Read
Random read operation allows the master to access any
memory location in the array. Prior to issuing the Slave
Address Byte with the R/W bit set to one, the master
must first perform a “dummy” write operation. The master
issues the START condition and the Slave Address Byte,
receives an ACKNOWLEDGE, then issues an Address
Byte. This “dummy” Write operation sets the address
pointer to the address from which to begin the random
EEPROM read operation.
After the X9525 acknowledges the receipt of the Address
Byte, the master immediately issues another START
condition and the Slave Address Byte with the R/W bit
set to one. This is followed by an ACKNOWLEDGE from
the X9525 and then by the eight bit word. The master ter-
minates the read operation by not responding with an
ACKNOWLEDGE and instead issuing a STOP condition
(Refer to Figure 15.).
A similar operation called “Set Current Address” also
exists. This operation is performed if a STOP is issued
instead of the second START shown in Figure 15. In this
case, the device sets the address pointer to that of the
Address Byte, and then goes into standby mode after the
STOP bit. All bus activity will be ignored until another
START is detected.
Sequential EEPROM Read
Sequential reads can be initiated as either a current
address read or random address read. The first Data
Byte is transmitted as with the other modes; however,
the master now responds with an ACKNOWLEDGE,
indicating it requires additional data. The X9525 contin-
ues to output a Data Byte for each ACKNOWLEDGE
received. The master terminates the read operation by
not responding with an ACKNOWLEDGE and instead
issuing a STOP condition.
The data output is sequential, with the data from
address n followed by the data from address n + 1. The
address counter for read operations increments through
the entire memory contents to be serially read during
one operation. At the end of the address space the
counter “rolls over” to address 00h and the device con-
tinues to output data for each ACKNOWLEDGE
received (Refer to Figure 16.).
0
Slave
Address
Address
Byte
A
C
K
A
C
K
S
t
a
r
t
S
t
o
p
Slave
Address
Data
A
C
K
1
S
t
a
r
t
SDA Bus
Signals from
the Slave
Signals from
the Master
Figure 15. Random EEPROM Address Read Sequence
0 1 0
0
0 0
1
1 0 1 0
0
0 0
READ Operation
WRITE Operation
“Dummy” Write
A
0
A
0
Data
(2)
S
t
o
p
Slave
Address
Data
(n)
A
C
K
A
C
K
SDA Bus
Signals from
the Slave
Signals from
the Master
1
Data
(n-1)
A
C
K
A
C
K
(n is any integer greater than 1)
Data
(1)
Figure 16. Sequential EEPROM Read Sequence
0
0 0
0
A
X9525
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
X9525BZ WAF 制造商:Intersil Corporation 功能描述:
X9525V20I 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(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 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝
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(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 供應(yīng)商設(shè)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
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