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ISO 15693-Compliant 1Kb Memory Fob
BLOCK
NUMBER
DATA BYTE NUMBER
(SEQUENCE LEFT TO RIGHT AS WRITTEN TO OR READ FROM DEVICE)
INTEGRITY BYTES
0
1
2
3
4
5
6
7
LSB
MSB
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
Page 0 User EEPROM R/(W)
Page 0 User EEPROM R/(W)
Page 0 User EEPROM R/(W)
Page 0 User EEPROM R/(W)
Page 1 User EEPROM R/(W)
Page 1 User EEPROM R/(W)
Page 1 User EEPROM R/(W)
Page 1 User EEPROM R/(W)
Page 2 User EEPROM R/(W)
Page 2 User EEPROM R/(W)
Page 2 User EEPROM R/(W)
Page 2 User EEPROM R/(W)
Page 3 User EEPROM R/(W)
Page 3 User EEPROM R/(W)
Page 3 User EEPROM R/(W)
Page 3 User EEPROM R/(W)
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
Write-Cycle Counter
10h
11h
U1
BP1
U2
BP2
U3
BP3
U4
BP4
AFI
U-Lock
DSFID
AFI-Lock
U5
DSFID-
Lock
U6
S-Lock
Write-Cycle Counter
Write-Cycle Counter
Figure 4. Memory Map
bit locations 49 to 56 identifies the chip manufacturer,
according to ISO/IEC 7816-6/AM1. This code is 2Bh
for Maxim. The code in the upper 8 bits is E0h. The
UID is read accessible through the Inventory and Get
System Information commands.
Detailed Memory Description
The memory of the MAX66120 is organized as 18
blocks of 8 bytes each. Figure 4 shows the memory
map. The first 16 blocks (block numbers 00h to 0Fh in
hexadecimal counting) are the user EEPROM, the area
for application-specific data. Four adjacent blocks are
also referred to as a page. Blocks 00h to 03h are
page 0, blocks 04h to 07h are page 1, blocks 08h to
0Bh are page 2, and blocks 0Ch to 0Fh are page 3.
Block 10h provides storage for user-programmable
parameters that are defined by the ISO 15693 stan-
dard. These are AFI and DSFID. The remaining bytes
(U1 to U6) are not defined by the communication stan-
dard; the application software can use them, e.g., for
proprietary markings. Block 11h contains control bytes
that determine the operation of the individual pages
(EPROM-emulation mode or write protection of individ-
ual blocks), or to write protect U1 to U4, the AFI, and
the DSFID byte. The S-Lock byte, if programmed to a
suitable code, only protects itself from future changes.
The self-protection feature can be used to permanently
mark the fob as being “special, ” as defined by the
application. Table 1 illustrates the relationship between
the controlling register in block 11h and the memory
area affected. Tables 2 and 3 specify the code assign-
ments to achieve the protection.
Besides the storage for 8 data bytes, each memory
block has 2 integrity bytes, which are not memory
mapped. The integrity bytes function as a MAX66120-
maintained, 16-bit write-cycle counter. Having reached
its maximum value of 65,535, the write-cycle counter
stops incrementing, but does not prevent additional
write cycles to the memory block. The integrity bytes
can be read through the Custom Read Block command.
4
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相关代理商/技术参数
MAX66120K-00AA+ 制造商:Maxim Integrated Products 功能描述:ISO 15693-COMPLIANT 1KB MEMORY FOB - Rail/Tube
MAX6612MXK 制造商:Maxim Integrated Products 功能描述:HIGH-SLOPE, LOW-POWER, ANALOG TEMPERATURE SEN - Cut Tape Product
MAX6612MXK+ 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR ANLG 5PIN SC-70 - Rail/Tube 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR H SLOPE L POWER SC70 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR, H SLOPE, L POWER, SC70
MAX6612MXK+T 功能描述:板上安装温度传感器 Low-Power Analog Temperature Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6612MXK-T 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6613MXK 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE ANALOG TEMPERATURE SENS - Rail/Tube
MAX6613MXK/V+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX6613MXK/V+T 功能描述:板上安装温度传感器 Low-Power Analog Temperature Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor