參數(shù)資料
型號(hào)： PCF85102C-2P
廠商： NXP SEMICONDUCTORS
元件分類： DRAM
英文描述： 256 x 8-bit CMOS EEPROMs with I2C-bus interface
中文描述： 256 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 99K
代理商： PCF85102C-2P
2000 Feb 15
8
Philips Semiconductors
Product specification
256
×
8-bit CMOS EEPROMs with
I
2
C-bus interface
PCF85102C-2; PCF85103C-2
8.3
Device addressing
Following a START condition, the bus master must output
the address of the slave it is accessing. The four MSBs of
the slave address are the device type identifier (see Fig.4
and Fig.5). For the PCF85102C-2, this is fixed to ‘1010’,
for the PCF85103C-2 to ‘0010’.
The next three significant bits address a particular device
or memory page (page = 256 bytes of memory). A system
could have up to sixteen PCF8510xC-2 devices on the
bus. This can be achieved with eight PCF85102C devices
and eight PCF85103C devices, combined on one I
2
C-bus.
The eight addresses are defined by the state of the A0, A1
and A2 inputs per type.
The last bit of the slave address defines the operation to
be performed. When set to logic 1, a read operation is
selected.
Address bits must be connected to either V
DD
or V
SS
.
8.3.1
R
EMARK
TheI
2
C-busdeviceselectaddress‘0010’isnotexclusively
reserved for device PCF85103C-2. Therefore, multiple
use has to be checked in advance.
8.4
Write operations
8.4.1
B
YTE
/
WORD WRITE
Forawriteoperation,thePCF8510xC-2requiresasecond
address field. This address field is a word address
providing access to the 256 words of memory. On receipt
of the word address, the PCF8510xC-2 responds with an
acknowledge and awaits the next eight bits of data, again
responding with an acknowledge. The word address is
automatically incremented. The master can now terminate
the transfer by generating a STOP condition or
transmitting up to six more bytes of data and then
terminating by generating a STOP condition.
AfterthisSTOPcondition,theE/W cyclestartsandthebus
is free for another transmission. The duration of the
E/W cycle is 10 ms per byte.
During the E/W cycle, the slave receiver does not send an
acknowledge bit if addressed via the I
2
C-bus.
8.4.2
P
AGE WRITE
The PCF8510xC-2 is capable of an 8-byte page write
operation. It is initiated in the same manner as the byte
write operation. The master can transmit eight data bytes
within one transmission. After receipt of each byte, the
PCF8510xC-2 will respond with an acknowledge.
The typical E/W time in this mode is 9
×
3.5 ms = 31.5 ms.
Erasing a block of eight bytes in page mode takes a typical
3.5 ms and sequential writing of these eight bytes another
typical 28 ms.
After the receipt of each data byte, the three low order bits
of the word address are internally incremented. The five
high order bits of the address remain unchanged.
The slave acknowledges the reception of each data byte
with an ACK. The I
2
C-bus data transfer is terminated by
the master after the eighth byte with a STOP condition.
If the master transmits more than eight bytes prior to
generating the STOP condition, no acknowledge will be
given on the ninth (and following) data bytes. Also, the
whole transmission will be ignored and no programming
will be done. As in the byte write operation, all inputs are
disabled until completion of the internal write cycles.
handbook, halfpage
MBC793
1
0
1
0
A2
A1
A0 R/W
Fig.4 Slave address for PCF85102C-2.
handbook, halfpage
MGL970
0
0
1
0
A2
A1
A0 R/W
Fig.5 Slave address for PCF85103C-2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF85102C-2P/03,11 功能描述:電可擦除可編程只讀存儲(chǔ)器 256X8-BIT CMOS 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
PCF85102C-2P-03 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:256 x 8-bit CMOS EEPROM with I2C-bus interface
PCF85102C-2T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:256 x 8-bit CMOS EEPROMs with I2C-bus interface
PCF85102C-2T/03,11 功能描述:電可擦除可編程只讀存儲(chǔ)器 256X8-BIT CMOS 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
PCF85102C-2T/03,112 制造商:NXP Semiconductors 功能描述:
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