收藏本站
NXP Semiconductors
PCA24S08A
1024 × 8-bit CMOS EEPROM with access protection
For example, when SB1 is a 1, the PB1 field can be written to any value by the system.
When the PB1 field is 11b, Block 1 can be written to by the system. Note that the state of
the SB1 bit does not affect whether or not Block 1 can be written.
There is no individual page Write Protection for any other block other than block 0 within
the device. Within the remaining blocks on the chip, access permissions are controlled on
a block basis (BP bits) or full chip basis (WP pin) only.
PCA24S08A_1
6.4.2.2
Access Protection Page (APP)
The serial port may be used to read and write the Access Protection Page (APP) and ID
Page using device access codes B8h and B9h instead of the normal value of A8h through
AFh (hex) that are used to access the rest of the EEPROM memory. The second byte of
write commands (the word address) should be in the range of 00h through 0Fh for the
APP page and 10h through 1Fh for the ID page. This coding is shown in Figure 11 .
Reads and writes to these two pages may take place on a single byte basis only.
Multi-byte operations will be NACKed.
As an example, the bit encoding for a single byte read and write command are shown in
Figure 11 .
The PCA24S08A will acknowledge all device addresses of B8h or B9h. If the most
significant three its of the word address are not all 0 (indicating an address outside the
Access protection and ID pages), the chip will NACK the access.
Byte 0 through byte 7 of the APP contain 8 identical sets of access control fields (PBx and
SBx) for each of the eight blocks of memory on the chip, which operate according to
Table 4 . When the sticky bit in one of these bytes is set, that byte can be written by the
system. Once a sticky bit is reset (written to zero) by the software, the byte containing it
can no longer be modified by the software until the next power cycle. These bytes can
always be read by the system.
Byte 8 contains another PB field (PBAP) as bit 0 and bit 1, and an additional sticky bit
(SBAP) as bit 7. The value of the PBAP bits controls read and write access to the last
7 bytes (byte 9 through byte 15) of the APP and all 16 bytes of the ID page according to
the encoding listed in Section 6.4 . The value of the PBAP bits can only be changed, a
write from the serial port, when SBAP is HIGH. This byte can always be read by the
system. Bit 0 through bit 6 of this byte are stored in EEPROM memory and do not change
when the power is cycled or the PROT pin changes state.
Byte 9 contains the eight block 0 write protection bits (WPN) for each page within block 0.
Byte 10 emulates a coil detection feature to keep compatibility with existing software
controlling device.
Even though the PCA24S08A does not have the RFID capability of the AT24RF03C, it
gives a ‘coil non-detected’ information when the detection feature is initiated.
The detection feature uses the Detection Enable bit (DE) and the Detect Coil bit (DC). At
power-up, DE = 0 and DC = 1. Detection is enabled by setting DE bit at 1. Since no coil is
detected, DC is then automatically reset and equal to 0.
DE is a read/write bit; DC is a read-only bit. Attempts to write to this bit will be ignored.
? NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 01 — 19 January 2010
11 of 24
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PCA24S08D/DG,118 IC EEPROM CMOS 1024X8 8-SOIC
PCA8581T/6,118 IC EEPROM 1KBIT 100KHZ 8SOIC
PCA9530D,118 IC LED DRIVER RGB 8-SOIC
PCA9531PW,118 IC LED DRIVER RGB 16-TSSOP
PCA9532D,118 IC LED DRIVER RGB 24-SOIC
PCA9533DP/01,118 IC LED DRIVER RGB 8-TSSOP
PCA9550DP,118 IC LED DRIVER BLINKER 8-TSSOP
PCA9551BS,118 IC LED DRIVER BLINKER 16-HVQFN
相关代理商/技术参数
PCA24S08ADP 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:1024 x 8-bit CMOS EEPROM with access protection
PCA24S08ADP,118 功能描述:电可擦除可编程只读存储器 CMOS 电可擦除可编程只读存储器 W/ACCESS PROTECTION 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
PCA24S08D 功能描述:电可擦除可编程只读存储器 1024X8 CMOS 电可擦除可编程只读存储器 ACCESS PROT 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
PCA24S08D,112 功能描述:电可擦除可编程只读存储器 1024X8 CMOS 电可擦除可编程只读存储器 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
PCA24S08D,118 功能描述:电可擦除可编程只读存储器 1024X8 CMOS 电可擦除可编程只读存储器 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
PCA24S08D/DG,118 功能描述:开关 IC - 各种 400kHz 3.6VDC 8-bit CMOS EEPROM RoHS:否 制造商:Fairchild Semiconductor 开启电阻（最大值）: 电源电压-最大:4.4 V 电源电压-最小:2.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WLCSP-9 封装:Reel
PCA24S08DP 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:1024 ?8-bit CMOS EEPROM with access protection
PCA24S08DP,118 功能描述:电可擦除可编程只读存储器 1024X8 CMOS 电可擦除可编程只读存储器 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