參數(shù)資料
型號(hào): M34D64BNT1
廠商: 意法半導(dǎo)體
元件分類: DRAM
英文描述: 64/32 Kbit Serial IC Bus EEPROM With Hardware Write Control on Top Quarter of Memory
中文描述: 64/32千位串行IC總線EEPROM,帶有硬件寫控制記憶的熱門季
文件頁(yè)數(shù): 4/15頁(yè)
文件大小: 119K
代理商: M34D64BNT1
M34D64, M34D32
4/15
reads the data to be a receiver. The device that
controls the data transfer is known as the master,
and the other as the slave. A data transfer can only
be initiated by the master, which will also provide
the serial clock for synchronization. The memory
device is always a slave device in all
communication.
Start Condition
START is identified by a high to low transition of
the SDA line while the clock, SCL, is stable in the
high state. A START condition must precede any
data transfer command. The memory device
continuously
monitors
programming cycle) the SDA and SCL lines for a
START condition, and will not respond unless one
is given.
Stop Condition
STOP is identified by a low to high transition of the
SDA line while the clock SCL is stable in the high
(except
during
a
state.
communication between the memory device and
the bus master. A STOP condition at the end of a
Read command, after (and only after) a NoAck,
forces the memory device into its standby state. A
STOP condition at the end of a Write command
triggers the internal EEPROM write cycle.
Acknowledge Bit (ACK)
An acknowledge signal is used to indicate a
successful byte transfer. The bus transmitter,
whether it be master or slave, releases the SDA
bus after sending eight bits of data. During the 9
th
clock pulse period, the receiver pulls the SDA bus
low to acknowledge the receipt of the eight data
bits.
Data Input
During data input, the memory device samples the
SDA bus signal on the rising edge of the clock,
SCL. For correct device operation, the SDA signal
must be stable during the clock low-to-high
A
STOP
condition
terminates
Figure 5. I
2
C Bus Protocol
SCL
SDA
SCL
SDA
SDA
START
CONDITION
SDA
INPUT
SDA
CHANGE
AI00792
STOP
CONDITION
1
2
3
7
8
9
MSB
ACK
START
CONDITION
SCL
1
2
3
7
8
9
MSB
ACK
STOP
CONDITION
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