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參數(shù)資料
| 型號： | 24AA32-P |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 32K 1.8V I 2 C O Smart Serial EEPROM |
| 中文描述： | 32K的1.8VI 2二氧化碳智能串行EEPROM |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 98K |
| 代理商： | 24AA32-P |
1996 Microchip Technology Inc.
DS21124C-page 7
24AA32
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
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
6.0
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.
6.1
Current Address Read
The 24AA32 contains an address counter that main-
tains the address of the last word accessed, internally
incremented by one. Therefore, if the previous access
(either a read or write operation) was to address n (n is
any legal address), the next current address read oper-
ation would access data from address n + 1. Upon
receipt of the slave address with R/W bit set to one, the
24AA32 issues an acknowledge and transmits the eight
bit data word. The master will not acknowledge the
transfer but does generate a stop condition and the
24AA32 discontinues transmission (Figure 6-1).
6.2
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
24AA32 as part of a write operation (R/W bit set to 0).
After the word address is sent, the master generates a
start condition following the acknowledge. This termi-
nates the write operation, but not before the internal
address pointer is set. Then the master issues the con-
trol byte again but with the R/W bit set to a one. The
24AA32 will then issue an acknowledge and transmit
the eight bit data word. The master will not acknowl-
edge the transfer but does generate a stop condition
which causes the 24AA32 to discontinue transmission
(Figure 6-2).
FIGURE 6-1:
CURRENT ADDRESS READ
S
t
a
r
t
Control
Byte
Data n
N
O
A
C
K
A
C
K
Bus Activity:
Master
SDA Line
Bus Activity
S
t
o
p
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 24AA512/S16K | 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,DIE - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24AA512/W16K | 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,WAFER - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24AA512/WF16K | 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,WAF - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24AA512-I/MF | 功能描述:電可擦除可編程只讀存儲器 64kx8 - 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據保留: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 |
| 24AA512-I/MS | 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE, IND - Rail/Tube 制造商:Microchip Technology Inc 功能描述:IC EEPROM 512KBIT 400KHZ 8MSOP 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE, IND, 8 MSOP 3x3mm TUBE |
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