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参数资料
| 型号： | DS2432X |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Programmable ROM |
| 英文描述： | 1K X 1 1-WIRE SERIAL EEPROM, PBGA6 |
| 封装： | UCSP-8 |
| 文件页数： | 11/16页 |
| 文件大小： | 168K |
| 代理商： | DS2432X |
Abridged Data Sheet
DS2432
4 of 14
1-WIRE CRC GENERATOR Figure 4
X
0
X
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
Polynomial = X
8 + X5 + X4 + 1
1
st
STAGE
2
nd
STAGE
3
rd
STAGE
4
th
STAGE
6
th
STAGE
5
th
STAGE
7
th
STAGE
8
th
STAGE
INPUT DATA
MEMORY MAP
The DS2432 has four memory areas: data memory, secrets memory, register page with special function
registers and user-bytes, and a scratchpad. The data memory is organized in pages of 32 bytes. Secret,
register page and scratchpad are 8 bytes each. The scratchpad acts as a buffer when writing to the data
memory, loading the initial secret or when writing to the register page. For further details (including
Figure 5) refer to the full version of the data sheet.
ADDRESS REGISTERS AND TRANSFER STATUS
The DS2432 employs three address registers: TA1, TA2 and E/S (Figure 6). These registers are common
to many other 1-Wire devices but operate slightly differently with the DS2432. Registers TA1 and TA2
must be loaded with the target address to which the data will be written or from which data will be read.
Register E/S is a read-only transfer-status register, used to verify data integrity with write commands.
Since the scratchpad of the DS2432 is designed to accept data in blocks of eight bytes only, the lower
three bits of TA1 will be forced to 0 and the lower three bits of the E/S register (Ending Offset) will
always read 1. This indicates that all the data in the scratchpad will be used for a subsequent copying into
main memory or secret. Bit 5 of the E/S register, called PF or “partial byte flag”, is a logic-1 if the
number of data bits sent by the master is not an integer multiple of 8 or if the data in the scratchpad is not
valid due to a loss of power. A valid write to the scratchpad will clear the PF bit. Bits 3, 4 and 6 have no
function; they always read 1. The Partial Flag supports the master checking the data integrity after a
Write command. The highest valued bit of the E/S register, called AA or Authorization Accepted, acts as
a flag to indicate that the data stored in the scratchpad has already been copied to the target memory
address. Writing data to the scratchpad clears this flag.
ADDRESS REGISTERS Figure 6
Bit #
7
6
5
4
3
2
1
0
Target Address (TA1)
T7
T6
T5
T4
T3
T2
(0)
T1
(0)
T0
(0)
Target Address (TA2)
T15
T14
T13
T12
T11
T10
T9
T8
Ending Address with
Data Status (E/S)
(Read Only)
AA
1
PF
1
E2
(1)
E1
(1)
E0
(1)
相关PDF资料 |
PDF描述 |
|---|---|
| DS2432P | 1K X 1 1-WIRE SERIAL EEPROM, PDSO6 |
| DS2433 | 512 X 8 1-WIRE SERIAL EEPROM, PBCY3 |
| DS2433X | 4K X 1 1-WIRE SERIAL EEPROM, UUC2 |
| DS2433S | 512 X 8 1-WIRE SERIAL EEPROM, PDSO8 |
| DS2434S | SPECIALTY MEMORY CIRCUIT, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2432X+ | 功能描述: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 |
| DS2432X+U | 制造商:Maxim Integrated Products 功能描述:1-W EEPROM 1KB W/SHA-1 UCSP PARTIAL - Rail/Tube |
| DS2432X-101-4D+T | 制造商:Maxim Integrated Products 功能描述:1KB PROTECTED 1-WIRE EEPROM WITH SHA-1 ENGINE - Tape and Reel |
| DS2432X-S | 功能描述: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 |
| DS2432X-S+ | 制造商:Maxim Integrated Products 功能描述:1-W EEPROM 1KB W/SHA-1 UCSP 2.5K TR - Tape and Reel |
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