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參數(shù)資料
| 型號： | CAT24WC12833KATE13 |
| 英文描述： | 128K-Bit I2C Serial CMOS EEPROM |
| 中文描述： | 128K的位I2C串行CMOS EEPROM的 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 414K |
| 代理商： | CAT24WC12833KATE13 |
CAT24WC128
6
Doc. No. 1038, Rev. E
acknowledge, and internally increment the six low order
address bits by one. The high order bits remain un-
changed.
If the Master transmits more than 64 bytes before sending
the STOP condition, the address counter
‘
wraps around
’
,
and previously transmitted data will be overwritten.
When all 64 bytes are received, and the STOP condition
has been sent by the Master, the internal programming
cycle begins. At this point, all received data is written to
the CAT24WC128 in a single write cycle.
Acknowledge Polling
Disabling of the inputs can be used to take advantage of
the typical write cycle time. Once the stop condition is
issued to indicate the end of the host's write operation,
CAT24WC128 initiates the internal write cycle. ACK
polling can be initiated immediately. This involves issu-
ing the start condition followed by the slave address for
a write operation. If CAT24WC128 is still busy with the
write operation, no ACK will be returned. If
CAT24WC128 has completed the write operation, an
ACK will be returned and the host can then proceed with
the next read or write operation.
WRITE PROTECTION
The Write Protection feature allows the user to protect
against inadvertent programming of the memory array.
If the WP pin is tied to V
CC
, the entire memory array is
protected and becomes read only. The CAT24WC128
will accept both slave and byte addresses, but the
memory location accessed is protected from program-
ming by the device
’
s failure to send an acknowledge
after the first byte of data is received.
READ OPERATIONS
The READ operation for the CAT24WC128 is initiated in
the same manner as the write operation with one excep-
tion, that R/
W
bit is set to one. Three different READ
operations are possible: Immediate/Current Address
READ, Selective/Random READ and Sequential READ.
Immediate/Current Address Read
The CAT24WC128
’
s address counter contains the ad-
dress of the last byte accessed, incremented by one. In
other words, if the last READ or WRITE access was to
address N, the READ immediately following would ac-
cess data from address N+1. If N=E (where E=16383),
then the counter will
‘
wrap around
’
to address 0 and
continue to clock out data. After the CAT24WC128
receives its slave address information (with the R/
W
bit
set to one), it issues an acknowledge, then transmits the
8 bit byte requested. The master device does not send
an acknowledge, but will generate a STOP condition.
Selective/Random Read
Selective/Random READ operations allow the Master
device to select at random any memory location for a
Figure 7. Page Write Timing
Figure 6. Byte Write Timing
A15
–
A8
SLAVE
ADDRESS
S
A
C
K
A
C
K
DATA
A
C
K
S
T
O
P
P
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
A7
–
A0
BYTE ADDRESS
A
C
K
*
*
A15
–
A8
SLAVE
ADDRESS
S
A
C
K
A
C
K
A
C
K
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
A7
–
A0
BYTE ADDRESS
DATA n+63
DATA
A
C
K
S
T
O
P
A
C
K
DATA n
A
C
K
P
A
C
K
*
*
*
=Don't Care Bit
*
=Don't Care Bit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CAT24WC12833KI-1.8TE13 | 128K-Bit I2C Serial CMOS EEPROM |
| CAT24WC12833KITE13 | 128K-Bit I2C Serial CMOS EEPROM |
| CAT24WC12833LA-1.8TE13 | 128K-Bit I2C Serial CMOS EEPROM |
| CAT24WC12833LATE13 | 128K-Bit I2C Serial CMOS EEPROM |
| CAT24WC12833LI-1.8TE13 | 128K-Bit I2C Serial CMOS EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT24WC128J | 功能描述:電可擦除可編程只讀存儲器 (384x8) 128k 16 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 |
| CAT24WC128J-1.8 | 功能描述:電可擦除可編程只讀存儲器 (384x8) 128k 16 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 |
| CAT24WC128JA | 功能描述:電可擦除可編程只讀存儲器 (384x8) 128k 16 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 |
| CAT24WC128JI | 功能描述:電可擦除可編程只讀存儲器 (384x8) 128k 16 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 |
| CAT24WC128JI-1.8 | 功能描述:電可擦除可編程只讀存儲器 (384x8) 128k 16 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 |
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