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參數(shù)資料
| 型號： | 24LC32ATSM |
| 英文描述： | High-Speed Secure Microcontroller |
| 中文描述： | I2C串行EEPROM的 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 186K |
| 代理商： | 24LC32ATSM |
24LC32A
DS21144D-page 6
1999 Microchip Technology Inc.
4.0
WRITE OPERATION
4.1
Byte Write
Following the start condition from the master, the con-
trol code (four bits), the device select (three bits), and
the R/W bit which is a logic low are clocked 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 acknowl-
edge bit during the ninth clock cycle. Therefore, the
next byte transmitted by the master is the high-order
byte of the word address and will be written into the
address pointer of the 24LC32A. The next byte is the
least significant address byte. After receiving another
acknowledge signal from the 24LC32A the master
device will transmit the data word to be written into the
addressed memory location.
The 24LC32A acknowledges again and the master
generates a stop condition. This initiates the internal
write cycle, and during this time the 24LC32A 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 24LC32A in the same way
as in a byte write. But instead of generating a stop con-
dition, the master transmits up to 32 bytes which are
temporarily stored in the on-chip page buffer and will be
written into memory after the master has transmitted a
stop condition. After receipt of each word, the five lower
address pointer bits are internally incremented by one.
If the master should transmit more than 32 bytes 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 internal 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.
FIGURE 4-1:
BYTE WRITE
FIGURE 4-2:
PAGE WRITE
0000
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
CONTROL
BYTE
ADDRESS
HIGH BYTE
ADDRESS
LOW BYTE
DATA
A
C
K
A
C
K
A
C
K
A
C
K
S
T
O
P
S
P
000 0
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
CONTROL
BYTE
ADDRESS
HIGH BYTE
ADDRESS
LOW BYTE
DATA BYTE 0
A
C
K
A
C
K
A
C
K
A
C
K
S
T
O
P
DATA BYTE 31
S
P
This Material Copyrighted by Its Respective Manufacturer
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| 24LC32ATSN | High-Speed Secure Microcontroller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24LC32AX/ST | 功能描述:電可擦除可編程只讀存儲器 4kx8 - 5/2.5V RotPin RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LC32AX-E/ST | 功能描述:電可擦除可編程只讀存儲器 4kx8 - 5/2.5V RotPin RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LC32AX-I/ST | 功能描述:電可擦除可編程只讀存儲器 4kx8 - 5/2.5V RotPin RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LC32AXT/ST | 功能描述:電可擦除可編程只讀存儲器 4kx8 - 5/2.5V RotPin RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24LC32AXT-E/ST | 功能描述:電可擦除可編程只讀存儲器 4kx8 - 5/2.5V RotPin RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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