X24C01SM-3.5

更新时间： 2024-02-04 05:09:00

品牌	Logo	应用领域
XICOR		可编程只读存储器
页数	文件大小	规格书
14页	58K
描述
Serial E2PROM

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中文翻译

获取价格

数据手册

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X24C01SM-3.5 数据手册

X24C01

Acknowledge Polling

Figure 6. ACK Polling Sequence

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.

WRITE OPERATION

COMPLETED

ENTER ACK POLLING

ISSUE

START

ISSUE SLAVE

ISSUE STOP

ADDRESS AND R/W = 0

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.

ACK

RETURNED?

YES

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

duringtheninthcycleorholdSDAHIGHduringtheninth

clock cycle and then issue a stop condition.

OPERATION

A WRITE?

YES

ISSUE STOP

PROCEED

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

operationisterminatedbythemaster;bynotresponding

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.

PROCEED

3837 FHD F11

Figure 7. Byte Read

WORD

ADDRESS n

BUS ACTIVITY:

MASTER

SDA LINE

L R A

BUS ACTIVITY:

X24C01

DATA n

3837 FHD F12

1...3 4 567 8 9...14

中文翻译

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