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參數(shù)資料
| 型號： | 24LC16B-ISL |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 16K 2.5V I 2 C O Serial EEPROM |
| 中文描述： | 16K的2.5VI 2二氧化碳串行EEPROM |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 75K |
| 代理商： | 24LC16B-ISL |
1996 Microchip Technology Inc.
DS20070G-page 5
24LC16B
3.6
Device Addressing
A control byte is the rst byte received following the
start condition from the master device. The control byte
consists of a four bit control code, for the 24LC16B this
is set as 1010 binary for read and write operations. The
next three bits of the control byte are the block select
bits (B2, B1, B0). They are used by the master device
to select which of the eight 256 word blocks of memory
are to be accessed. These bits are in effect the three
most signicant bits of the word address. It should be
noted that the protocol limits the size of the memory to
eight blocks of 256 words, therefore the protocol can
support only one 24LC16B per system.
The last bit of the control byte denes the operation to
be performed. When set to one a read operation is
selected, when set to zero a write operation is selected.
Following the start condition, the 24LC16B monitors the
SDA bus checking the device type identier being
transmitted, upon a 1010 code the slave device outputs
an acknowledge signal on the SDA line. Depending on
the state of the R/W bit, the 24LC16B will select a read
or write operation.
FIGURE 3-2:
CONTROL BYTE
ALLOCATION
Operation
Control
Code
Block Select
R/W
Read
1010
Block Address
1
Write
1010
Block Address
0
SLAVE ADDRESS
X = Don’t care
101
0X
X
R/W
A
START
READ/WRITE
4.0
WRITE OPERATION
4.1
Byte Write
Following the start condition from the master, the
device code (4 bits), the block address (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 24LC16B. After receiving
another acknowledge signal from the 24LC16B the
master device will transmit the data word to be written
into the addressed memory location. The 24LC16B
acknowledges again and the master generates a stop
condition. This initiates the internal write cycle, and dur-
ing this time the 24LC16B will not generate acknowl-
edge signals (Figure 4-1).
4.2
Page Write
The write control byte, word address and the rst data
byte are transmitted to the 24LC16B in the same way
as in a byte write. But instead of generating a stop con-
dition the master transmits up to 16 data bytes to the
24LC16B which are temporarily stored in the on-chip
page buffer and will be written into the memory after the
master has transmitted a stop condition. After the
receipt of each word, the four lower order address
pointer bits are internally incremented by one. The
higher order seven bits of the word address remains
constant. If the master should transmit more than 16
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).
FIGURE 4-1:
BYTE WRITE
FIGURE 4-2:
PAGE WRITE
S
P
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS
DATA
A
C
K
A
C
K
A
C
K
S
P
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
S
T
A
R
T
CONTROL
BYTE
WORD
ADDRESS (n)
DATA n
DATA n + 15
S
T
O
P
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
DATA n + 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 24LC16B-ISN | 16K 2.5V I 2 C O Serial EEPROM |
| 24LC16B-MT | 8K/16K I 2 C ⑩ Serial EEPROMs in ISO Micromodules |
| 24LC16B-P | 16K 2.5V I 2 C O Serial EEPROM |
| 24LC16B-SL | 16K 2.5V I 2 C O Serial EEPROM |
| 24LC16B-SN | 16K 2.5V I 2 C O Serial EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24LC16BISN | 制造商:Microchip Technology Inc 功能描述: |
| 24LC16B-ISN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:16K 2.5V I 2 C O Serial EEPROM |
| 24LC16B-M/SN | 功能描述:電可擦除可編程只讀存儲器 16K 2K X 8 2.5V SERIAL EE MIL 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(shí)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 |
| 24LC16B-MT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8K/16K I 2 C ⑩ Serial EEPROMs in ISO Micromodules |
| 24LC16B-P | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:16K 2.5V I 2 C O Serial EEPROM |
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