- 您现在的位置：买卖IC网 > Sheet目录350 > PCF8594C-2T/02,118 (NXP Semiconductors)IC EEPROM 4KBIT 100KHZ 8SOIC
Philips Semiconductors
PCF8594C-2
512 × 8-bit CMOS EEPROM with I 2 C-bus interface
The master receiver must generate an acknowledge after the reception of each byte
that has been clocked out of the slave transmitter.
The device that acknowledges has to pull down the SDA line during the acknowledge
clock pulse in such a way that the SDA line is stable LOW during the HIGH period of
the acknowledge related clock pulse.
Set-up and hold times must be taken into account. A master receiver must signal an
end of data to the slave transmitter by not generating an acknowledge on the last byte
that has been clocked out of the slave. In this event, the transmitter must leave the
data line HIGH to enable the master generation of the STOP condition.
8.1.3
Device addressing
Following a START condition, the bus master must output the address of the slave it
is accessing. The address of the PCF8594C-2 is shown in Figure 4 . To conserve
power, no internal pull-up resistors are incorporated on the hardware selectable pins
and they must be connected to either V DD or V SS .
1
0
1
0
A2
A1
A0 R/W
FIXED
SOFTWARE
SELECTABLE
HARDWARE
SELECTABLE
002aaa261
Fig 4. Slave address.
The last bit of the slave address de?nes the operation to be performed. When set to
logic 1, a read operation is selected, while a logic 0 selects a write operation.
9397 750 14221
8.1.4
Write operations
A write-protection input at Pin 1 (WP) allows disabling of write commands from the
master by a hardware signal. Write accesses are allowed to either the upper or lower
256 bytes of the EEPROM if the pin WP is LOW, or the lower 256 bytes of the
EEPROM if the pin WP is HIGH. When the pin WP is HIGH the upper 256 bytes of
the EEPROM are write-protected and no acknowledge will be given by the
PCF8594C-2 when data is sent. However, an acknowledge will be given after the
slave address and the word address.
Byte/word write: For a write operation, the PCF8594C-2 requires a second address
?eld. This address ?eld is a word address providing access to the 256 words of
memory. Upon receipt of the word address, the PCF8594C-2 responds with an
acknowledge and awaits the next eight bits of data, again responding with an
acknowledge. Word address is automatically incremented. The master can now
terminate the transfer by generating a STOP condition or transmit up to six more
bytes of data and then terminate by generating a STOP condition.
After this STOP condition, the E/W cycle starts and the bus is free for another
transmission. Its duration 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.
? Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 05 — 25 October 2004
7 of 21
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
PCF8598C-2P/02,112
IC EEPROM 8KBIT 100KHZ 8DIP
PCU9955TW,118
IC LED DRVR CONST CURR
PDA006B-700C
LED DRIVER 6W 700MA
PDA010B-700C
LED DRIVER 8.4W 700MA
PDA015B-350C
LED DRIVER 15W 350MA
PDA030B-700C
LED DRIVER 30W 700MA
PDC500-1024F
SINGLE OUTPUT 500W 24V
PDU1215
POWER STRIP 15A 13 OUT RACK M
相关代理商/技术参数
PCF8594C-2T/02112
制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
PCF8594C-2T02
制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:512 X 8-bit CMOS EEPROM with I2C-bus interface
PCF8594E2D
制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
PCF8594E2N
制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
PCF8594P
制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
PCF8594T
制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
PCF8598C-2
制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:256 to 1024 x 8-bit CMOS EEPROMs with I2C-bus interface
PCF8598C2D
功能描述:电可擦除可编程只读存储器 8K/1024 电可擦除可编程只读存储器 I2C BUS RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8