參數(shù)資料
型號(hào)： 24VL014HT/P
元件分類(lèi)： PROM
英文描述： I2C/2-WIRE SERIAL EEPROM, PDIP8
封裝： 0.300 INCH, LEAD FREE, PLASTIC, DIP-8
文件頁(yè)數(shù)： 3/28頁(yè)
文件大?。?/td> 447K
代理商： 24VL014HT/P
2008 Microchip Technology Inc.
DS22116A-page 11
24VL014H
8.0
READ OPERATIONS
Read operations are initiated in the same way as write
operations, with the exception that the R/W bit of the
slave address is set to ‘1’. There are three basic types
of read operations: current address read, random read
and sequential read.
8.1
Current Address Read
The 24VL014H contains an address counter that main-
tains the address of the last word accessed, internally
incremented by one. Therefore, if the previous read
access was to address n, the next current address read
operation would access data from address n + 1. Upon
receipt of the slave address with the R/W bit set to ‘1’,
the 24VL014H issues an acknowledge and transmits
the 8-bit data word. The master will not acknowledge
the transfer, but does generate a Stop condition and the
24VL014H discontinues transmission (Figure 8-1).
8.2
Random Read
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, the word address must first
be set. This is done by sending the word address to the
24VL014H as part of a write operation.
Once the word address is sent, the master generates a
Start
condition
following
the
acknowledge.
This
terminates the write operation, but not before the
internal Address Pointer is set. The master then issues
the control byte again but with the R/W bit set to a ‘1’.
The 24VL014H will then issue an acknowledge and
transmits the eight-bit data word. The master will not
acknowledge the transfer, but does generate a Stop
condition and the 24VL014H discontinues transmission
(Figure 8-2). After this command, the internal address
counter will point to the address location following the
one that was just read.
8.3
Sequential Read
Sequential reads are initiated in the same way as a
random read except that after the 24VL014H transmits
the first data byte, the master issues an acknowledge
as opposed to a Stop condition in a random read. This
directs the 24VL014H to transmit the next sequentially
addressed 8-bit word (Figure 8-3).
To provide sequential reads, the 24VL014H contains
an internal Address Pointer which is incremented by
one at the completion of each operation. This Address
Pointer allows the entire memory contents to be serially
read during one operation. The internal Address
Pointer will automatically roll over from address 7Fh to
address 00h.
FIGURE 8-1:
CURRENT ADDRESS READ
Bus Activity
Master
SDA Line
Bus Activity
P
S
T
O
P
Control
Byte
S
T
A
R
T
Data
A
C
K
N
O
A
C
K
相關(guān)PDF資料
PDF描述
24VL024H/ST I2C/2-WIRE SERIAL EEPROM, PDSO8
24VL024HT/MNY I2C/2-WIRE SERIAL EEPROM, PDSO8
25.000.1956.0 STRIP TERMINAL BLOCK
25.001.1756.0 STRIP TERMINAL BLOCK
25.342.2053.0 15 A, MODULAR TERMINAL BLOCK, 1 ROW, 1 DECK
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
24VL014T 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:1K I2C? Serial EEPROM
24VL014T/MNY 功能描述:電可擦除可編程只讀存儲(chǔ)器 1K 128 X 8 SERIAL EE 1.5V RoHS:否 制造商:Atmel 存儲(chǔ)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
24VL014T/MNY-CUT TAPE 制造商:Microchip 功能描述:24VL014 Series 1 Kb I2C 2 Wire (128 x 8) 1.5 V Serial EEPROM SMT - TDFN-8
24VL014T/MS 功能描述:電可擦除可編程只讀存儲(chǔ)器 1K 128 X 8 SERIAL EE 1.5V RoHS:否 制造商:Atmel 存儲(chǔ)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
24VL014T/OT 功能描述:電可擦除可編程只讀存儲(chǔ)器 1K 128 X 8 SERIAL EE 1.5V RoHS:否 制造商:Atmel 存儲(chǔ)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
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