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參數(shù)資料
| 型號(hào)： | 24C02SCW08 |
| 英文描述： | Silicon Serial Number |
| 中文描述： | I2C串行EEPROM的 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 168K |
| 代理商： | 24C02SCW08 |
1999 Microchip Technology Inc.
DS21170D-page 5
24C01SC/02SC
3.6
Slave Address
After generating a START condition, the bus master
transmits the slave address consisting of a 4-bit device
code (1010) for the 24C01SC/02SC, followed by three
don’t care bits.
The eighth bit of slave address determines if the master
device wants to read or write to the 24C01SC/02SC
(Figure 3-2).
The 24C01SC/02SC monitors the bus for its corre-
sponding slave address all the time. It generates an
acknowledge bit if the slave address was true, and it is
not in a programming mode.
FIGURE 3-2:
CONTROL BYTE
ALLOCATION
Operation
Control
Code
Chip
Select
R/W
Read
Write
1010
1010
XXX
XXX
1
0
X = Don’t care
R/W
A
1
0
1
0
X
X
X
READ/WRITE
START
SLAVE ADDRESS
4.0
WRITE OPERATION
4.1
Byte Write
Following the start signal from the master, the device
code (4 bits), the don’t care bits (3 bits), and the R/W
bit, which is a logic low, is placed onto the bus by the
master transmitter. This indicates to the addressed
slave receiver that a byte with a word address will follow
after it has generated an acknowledge bit during the
ninth clock cycle. Therefore, the next byte transmitted
by the master is the word address and will be written
into the address pointer of the 24C01SC/02SC. After
receiving another acknowledge signal from the
24C01SC/02SC, the master device will transmit the
data word to be written into the addressed memory
location. The 24C01SC/02SC acknowledges again and
the master generates a stop condition. This initiates the
internal write cycle, and during this time the
24C01SC/02SC will not generate acknowledge signals
(Figure 4-1).
4.2
Page Write
The write control byte, word address, and the first data
byte are transmitted to the 24C01SC/02SC in the same
way as in a byte write. But instead of generating a stop
condition, the master transmits up to eight data bytes to
the 24C01SC/02SC, which are temporarily stored in
the on-chip page buffer and will be written into the
memory after the master has transmitted a stop condi-
tion. After the receipt of each word, the three lower
order address pointer bits are internally incremented by
one. The higher order five bits of the word address
remains constant. If the master should transmit more
than eight words prior to generating the stop condition,
the address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the stop condition is received an inter-
nal write cycle will begin (Figure 4-2).
Note:
Page write operations are limited to writing
bytes within a single physical page, regard-
less of the number of bytes actually being
written. Physical page boundaries start at
addresses that are integer multiples of the
page buffer size (or ‘page size’) and end at
addresses that are integer multiples of
[page size - 1]. If a page write command
attempts to write across a physical page
boundary, the result is that the data wraps
around to the beginning of the current page
(overwriting data previously stored there),
instead of being written to the next page as
might be expected. It is therefore neces-
sary for the application software to prevent
page write operations that would attempt to
cross a page boundary.
This Material Copyrighted by Its Respective Manufacturer
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 24C02SCWF | I2C Serial EEPROM |
| 24C02SCWF08 | I2C Serial EEPROM |
| 24C01 | 2-Wire Serial EEPROM |
| 24C01SC-S | 24C01C-P 24C01C-IP 24C01C-EP 24C01C-SN 24C01C-ISN 24C01C-ESN 24C01C-ST 24C01C-IST 24C01C-EST |
| 24C01SC-S08 | 24C01C-P 24C01C-IP 24C01C-EP 24C01C-SN 24C01C-ISN 24C01C-ESN 24C01C-ST 24C01C-IST 24C01C-EST |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24C02SC-W08 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:24C01C-P 24C01C-IP 24C01C-EP 24C01C-SN 24C01C-ISN 24C01C-ESN 24C01C-ST 24C01C-IST 24C01C-EST |
| 24C02SCWF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24C02SC-WF | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:24C01C-P 24C01C-IP 24C01C-EP 24C01C-SN 24C01C-ISN 24C01C-ESN 24C01C-ST 24C01C-IST 24C01C-EST |
| 24C02SCWF08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24C02SC-WF08 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:24C01C-P 24C01C-IP 24C01C-EP 24C01C-SN 24C01C-ISN 24C01C-ESN 24C01C-ST 24C01C-IST 24C01C-EST |
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