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參數(shù)資料
| 型號(hào)： | X24C01PM-3.5 |
| 英文描述： | Serial E2PROM |
| 中文描述： | 串行E2PROM |
| 文件頁數(shù)： | 6/14頁 |
| 文件大?。?/td> | 56K |
| 代理商： | X24C01PM-3.5 |
6
X24C01
Figure 6. ACK Polling Sequence
Acknowledge Polling
The disabling of the inputs can be used to take advan-
tage of the typical 5 ms write cycle time. Once the stop
condition is issued to indicate the end of the host’s write
operation the X24C01 initiates the internal write cycle.
ACK polling can be initiated immediately. This involves
issuing the start condition followed by the word address
for a
write operation
. If the X24C01 is still busy with the
write operation no ACK will be returned. If the X24C01
has completed the write operation an ACK will be
returned and the controller can then proceed with the
next read or write operation.
READ OPERATIONS
Read operations are initiated in the same manner as
write operations with exception that the R/W bit of the
word address is set to a one. There are two basic read
operations: byte read and sequential read.
It should be noted that the ninth clock cycle of the read
operation is not a “don’t care.” To terminate a read
operation, the master must either issue a stop condition
during the ninth cycle or hold SDA HIGH during the ninth
clock cycle and then issue a stop condition.
Byte Read
To initiate a read operation, the master sends a start
condition followed by a seven bit word address and a
read bit. The X24C01 responds with an acknowledge
and then transmits the eight bits of data. The read
operation is terminated by the master; by not responding
with an acknowledge and by issuing a stop condition.
Refer to Figure 7 for the start, word address, read bit,
acknowledge and data transfer sequence.
WRITE OPERATION
COMPLETED
ENTER ACK POLLING
ISSUE
START
ISSUE SLAVE
ADDRESS AND R/W = 0
ACK
RETURNED
NEXT
OPERATION
A WRITE
PROCEED
ISSUE STOP
NO
YES
YES
PROCEED
ISSUE STOP
NO
3837 FHD F11
Figure 7. Byte Read
3837 FHD F12
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
X24C01
S
T
A
R
T
WORD
ADDRESS n
S
T
O
P
P
A
C
K
DATA n
R
/
W
L
S
B
S
M
S
B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X24C01SM-3 | Serial E2PROM |
| X24C01SM-3.5 | Serial E2PROM |
| X24C01M | Serial E2PROM |
| X24C01MI | Serial E2PROM |
| X24C01MM | Serial E2PROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X24C01PMG | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Serial E2PROM |
| X24C01PMG-2.7 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Serial E2PROM |
| X24C01PMG-3 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Serial E2PROM |
| X24C01PMG-3.5 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Serial E2PROM |
| X24C01S | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Serial E2PROM |
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