最新免费av在线观看,亚洲综合一区成人在线,中文字幕精品无码一区二区三区,中文人妻av高清一区二区,中文字幕乱偷无码av先锋

M14C64 Datasheet

  • M14C64

  • Memory Card IC 64/32 Kbit Serial IC Bus EEPROM

  • 14頁

  • STMICROELECTRONICS   STMICROELECTRONICS

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

M14C64, M14C32
the seven bits are fixed at 1010000b (A0h), as
shown in Table 5.
The 8
th
bit is the read or write bit (RW). This bit is
set to 鈥?鈥?for read and 鈥?鈥?for write operations. If a
match occurs on the Device Select Code, the cor-
responding memory gives an acknowledgment on
the SDA bus during the 9
th
bit time. If the memory
does not match the Device Select code, it will de-
select itself from the bus, and go into stand-by
mode.
Each data byte in the memory has a 16-bit (two
byte wide) address. The Most Significant Byte (Ta-
ble 3) is sent first, followed by the Least significant
Byte (Table 4). Bits b15 to b0 form the address of
the byte in memory. Bits b15 to b13 are treated as
a Don鈥檛 Care bit on the M14C64 memory. Bits b15
to b12 are treated as Don鈥檛 Care bits on the
M14C32 memory.
Write Operations
Following a START condition the master sends a
Device Select code with the RW bit set to 鈥?鈥? as
Figure 6. Write Mode Sequences with WC=1
WC
ACK
BYTE WRITE
START
DEV SEL
R/W
ACK
ACK
NO ACK
DATA IN
STOP
ACK
ACK
NO ACK
DATA IN 1
DATA IN 2
BYTE ADDR
R/W
BYTE ADDR
NO ACK
STOP
shown in Table 6. The memory acknowledges it
and waits for two bytes of address, which provides
access to the memory area. After receipt of each
byte address, the memory again responds with an
acknowledge and waits for the data byte. Writing
in the memory may be inhibited if input pin WC is
taken high.
Any write command with WC=1 (during a period of
time from the START condition until the end of the
two bytes address) will not modify the memory
content and will NOT be acknowledged on data
bytes, as shown in Figure 6.
Byte Write
In the Byte Write mode, after the Device Select
code and the address, the master sends one data
byte. If the addressed location is write protected by
the WC pin, the memory replies with a NoACK,
and the location is not modified. If, instead, the WC
pin has been held at 0, as shown in Figure 7, the
memory replies with an ACK. The master termi-
nates the transfer by generating a STOP condi-
tion.
BYTE ADDR
BYTE ADDR
WC
ACK
PAGE WRITE
START
WC (cont'd)
NO ACK
PAGE WRITE
(cont'd)
DEV SEL
DATA IN N
AI01120B
5/14

M14C64相關(guān)型號(hào)PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號(hào)推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！