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參數(shù)資料
| 型號： | 24AA174 |
| 英文描述： | Serial EEPROM |
| 中文描述： | 串行EEPROM |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 160K |
| 代理商： | 24AA174 |
24AA174
DS21102F-page 6
1999 Microchip Technology Inc.
FIGURE 4-1:
BYTE WRITE
FIGURE 4-2:
PAGE WRITE
S
T
O
P
SDA LINE
P
DATA
S
T
A
R
T
CONTROL
BYTE
S
WORD
ADDRESS
BUS ACTIVITY:
MASTER
BUS ACTIVITY:
A
C
K
A
C
K
A
C
K
1 A2
B0
A1 A0 B2 B1
S
T
O
P
SDA LINE
P
DATA n
S
T
A
R
T
CONTROL
BYTE
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 + 15
A
C
K
S
A2
B0
A1 A0 B2 B1
5.0
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 send-
ing 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 5-1 for flow diagram.
FIGURE 5-1:
ACKNOWLEDGE POLLING
FLOW
6.0
WRITE PROTECTION
The 24AA174 can be used as a serial ROM when the
WP pin is connected to V
CC
. Programming will be inhib-
ited and the entire memory will be write-protected.
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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 24AA174/P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24AA174-/P | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:16K 1.8V Cascadable I2C⑩ Serial EEPROM with OTP Security Page |
| 24AA174/SN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24AA174-/SN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:16K 1.8V Cascadable I2C⑩ Serial EEPROM with OTP Security Page |
| 24AA256/P | 功能描述:電可擦除可編程只讀存儲器 32kx8 - 1.8V 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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