參數(shù)資料
型號(hào)： X9520V20IB
廠商： Intersil Corporation
英文描述： Triple DCP, POR,2kbit EEPROM Memory, Dual Voltage Monitors
中文描述： 三氯酚，葡萄牙，2kbit EEPROM存儲(chǔ)器，雙電壓監(jiān)視器
文件頁(yè)數(shù)： 12/33頁(yè)
文件大?。?/td> 561K
代理商： X9520V20IB
12
FN8206.0
March 8, 2005
Byte. This “dummy” Write operation sets the address
pointer to the address from which to begin the random
EEPROM read operation.
After the X9520 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 X9520 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 X9520 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
WRITE Operation
“Dummy” Write
READ Operation
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
X9520
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X9520V20IZ-A 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple DCP, POR, 2kbit EEPROM Memory, Dual Voltage Monitors
X9520V20IZ-AT1 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple DCP, POR, 2kbit EEPROM Memory, Dual Voltage Monitors
X9520V20IZ-AT2 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple DCP, POR, 2kbit EEPROM Memory, Dual Voltage Monitors
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