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參數(shù)資料
| 型號： | X24645SI-2.7 |
| 英文描述： | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| 中文描述： | 先進的2線串行e的2座門鎖TM保護胎膜早破 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 84K |
| 代理商： | X24645SI-2.7 |
X24645
5
Figure 5. Byte Write
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
X24645
S
T
A
R
T
SLAVE
ADDRESS
S
S
T
O
P
P
A
C
K
A
C
K
A
C
K
BYTE
ADDRESS
DATA
2783 ILL F08.1
DEVICE ADDRESSING
Following a start condition the master must output the
address of the slave it is accessing (see Figure 4). The
next two bits are the device select bits. A system could
have up to four X24645’s on the bus. The four
addresses are defined by the state of the S
inputs. S
2
of the slave address must be the inverse of
the S
2
input pin.
1
and S
2
Figure 4. Slave Address
The next five bits of the slave address are an exten-
sion of the array’s address and are concatenated with
the eight bits of address in the byte address field,
providing direct access to the whole 8192 x 8 array.
2783 ILL F07.1
S2
A9
A8
R/W
DEVICE
SELECT
S1
A12
HIGH ORDER
ADDRESS
BITS
A11
A10
The last bit of the slave address defines the operation to
be performed. When set HIGH a read operation is
selected, when set LOW, a write operation is selected.
Following the start condition, the X24645 monitors the
SDA bus comparing the slave address being transmitted
with its slave address device type identifier. Upon a
correct compare the X24645 outputs an acknowledge on
the SDA line. Depending on the state of the R/W bit, the
X24645 will execute a read or write operation.
WRITE OPERATIONS
Byte Write
For a write operation, the X24645 requires a second ad-
dress field. This address field is the byte address, com-
prised of eight bits, providing access to any one of 8192
words in the array. Upon receipt of the byte address, the
X24645 responds with an acknowledge and awaits the
next eight bits of data, again responding with an acknowl-
edge. The master then terminates the transfer by gener-
ating a stop condition, at which time the X24645 begins
the internal write cycle to the nonvolatile memory. While
the internal write cycle is in progress the X24645 inputs
are disabled, and the device will not respond to any re-
quests from the master. Refer to Figure 5 for the address,
acknowledge and data transfer sequence.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X24645SM-2.7 | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645V-2.7 | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645VI-2.7 | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645VM-2.7 | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645 | Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X24645SIG | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645SIG-2.7 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645SM | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645SM-2.7 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645SMG | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
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