參數(shù)資料
型號(hào): M14C04DD
廠商: 意法半導(dǎo)體
英文描述: M14C04 Die Description
中文描述: M14C04模具描述
文件頁數(shù): 7/13頁
文件大?。?/td> 108K
代理商: M14C04DD
7/13
M14C16, M14C04
Random Address Read
A dummy write is performed to load the address
into the address counter, as shown in Figure 8.
This is followed by another START condition from
the master and the device select is repeated with
the RW
bit set to ‘1’. The memory acknowledges
this, and outputs the byte addressed. The master
must
not
acknowledge the byte output, and termi-
nates the transfer with a STOP condition.
Sequential Read
This mode can be initiated with either a Current
Address Read or a Random Address Read. How-
ever, in this case the master
does
acknowledge
the data byte output, and the memory continues to
output the next byte in sequence. To terminate the
stream of bytes, the master must
not
acknowledge
the last byte output, and
must
generate a STOP
condition. The output data comes from consecu-
tive addresses, with the internal address counter
automatically incremented after each byte output.
with an ACK, indicating that the memory is
ready to receive the second part of the next in-
struction (the first byte of this instruction having
been sent during Step 1).
Read Operations
Read operations are independent of the state of
the WC pin. On delivery, the memory content is set
at all “1’s” (FFh).
Current Address Read
The memory has an internal address counter.
Each time a byte is read, this counter is increment-
ed. For the Current Address Read mode, following
a START condition, the master sends a device se-
lect with the RW bit set to ‘1’. The memory ac-
knowledges this, and outputs the byte addressed
by the internal address counter. The counter is
then incremented. The master must
not
acknowl-
edge the byte output, and terminates the transfer
with a STOP condition, as shown in Figure 8.
Figure 7. Write Cycle Polling Flowchart using ACK
WRITE Cycle
in Progress
AI02165
Next
Operation is
Addressing the
Memory
START Condition
DEVICE SELECT
with RW = 0
ACK
Returned
YES
NO
YES
NO
ReSTART
STOP
Proceed
WRITE Operation
Proceed
Random Address
READ Operation
Send
Byte Address
First byte of instruction
with RW = 0 already
decoded by M14xxx
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