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參數(shù)資料
| 型號(hào)： | X9521 |
| 英文描述： | Dual DCP, EEPROM Memory |
| 中文描述： | 雙二氯酚，EEPROM存儲(chǔ)器 |
| 文件頁(yè)數(shù)： | 11/26頁(yè) |
| 文件大?。?/td> | 434K |
| 代理商： | X9521 |
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REV 1.1.9 1/30/03
Characteristics subject to change without notice.
11 of 26
www.xicor.com
X9521
– Preliminary Information
the Device Type Identifier 1010111 or 1010010). Immedi-
ately after an operation to a DCP or CONSTAT Register is
performed, only a “Random EEPROM Read” is available.
Immediately following a “Random EEPROM Read” , a
“Current EEPROM Address Read” or “Sequential
EEPROM Read” is once again available (assuming that
no access to a DCP or CONSTAT Register occur in the
interim).
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 X9521 acknowledges the receipt of the Address
Byte, the master immediately issues another START con-
dition and the Slave Address Byte with the R/W bit set to
one. This is followed by an ACKNOWLEDGE from the
X9521 and then by the eight bit word. The master termi-
nates 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 mas-
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
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
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| X9521_06 | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9521V20I | 功能描述:IC LASR CTRLR 2CHAN 5.5V 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 |
| X9521V20I-A | 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 |
| X9521V20I-B | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
| X9521V20IZ-A | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Dual DCP, EEPROM Memory |
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