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參數(shù)資料
| 型號(hào)： | 24LC01B |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 1K 2.5V CMOS serial EEPROM(1K位、8字節(jié)頁(yè)面緩沖器、有硬件寫保護(hù)、10M次擦寫周期、2.5-5.5V工作電壓、CMOS IIC串行EEPROM) |
| 中文描述： | 一千為2.5V的CMOS串行EEPROM（每1000位，8字節(jié)頁(yè)面緩沖器，有硬件寫保護(hù)，1000萬(wàn)次擦寫周期,2.5 - 5 .5 V工作電壓，國(guó)際進(jìn)口證的CMOS串行EEPROM的） |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大?。?/td> | 111K |
| 代理商： | 24LC01B |
24LC01B/02B
DS20071G-page 6
1995 Microchip Technology Inc.
6.0
ACKNOWLEDGE POLLING
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write com-
mand has been issued from the master, the device ini-
tiates the internally timed write cycle. ACK polling can
be initiated immediately. This involves the master
sending a start condition followed by the control byte
for a write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If the cycle is complete, then the device will return the
ACK and the master can then proceed with the next
read or write command. See Figure 6-1 for flow dia-
gram.
FIGURE 6-1:
ACKNOWLEDGE POLLING
FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0)
Next
Operation
No
Yes
7.0
WRITE PROTECTION
The 24LC01B/02B can be used as a serial ROM when
the WP pin is connected to V
CC
. Programming will be
inhibited and the entire memory will be write-protected.
8.0
READ OPERATION
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 one. There are three basic
types of read operations: current address read, random
read, and sequential read.
8.1
Current Address Read
The 24LC01B/02B contains an address counter that
maintains the address of the last word accessed, inter-
nally incremented by one. Therefore, if the previous
access (either a read or write operation) was to
address n, the next current address read operation
would access data from address n + 1. Upon receipt of
the slave address with R/W bit set to one, the
24LC01B/02B issues an acknowledge and transmits
the eight bit data word. The master will not acknowl-
edge the transfer but does generate a stop condition
and the 24LC01B/02B discontinues transmission (see
Figure 8-2).
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, first the word address must
be set. This is done by sending the word address to the
24LC01B/02B as part of a write operation. After the
word address is sent, the master generates a start con-
dition following the acknowledge. This terminates the
write operation, but not before the internal address
pointer is set. Then the master issues the control byte
again but with the R/W bit set to a one. The 24LC01B/
02B 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
24LC01B/02B
discontinues
Figure 8-3).
transmission
(see
FIGURE 8-1:
PAGE WRITE
S
T
O
P
SDA LINE
P
DATA n
S
T
A
R
T
CONTROL
BYTE
S
WORD
ADDRESS (n)
BUS ACTIVITY:
MASTER
BUS ACTIVITY:
A
C
K
A
C
K
A
C
K
DATA n + 1
A
C
K
DATA n + 7
A
C
K
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24LC01B/MS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| 24LC01B/MT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24LC01B-/OT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24LC01B/P | 功能描述:電可擦除可編程只讀存儲(chǔ)器 128x8 - 1.8V 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 |
| 24LC01B-/P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
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