參數(shù)資料
型號(hào)： DS2432P
廠商： DALLAS SEMICONDUCTOR
元件分類： Programmable ROM
英文描述： 1K X 1 1-WIRE SERIAL EEPROM, PDSO6
封裝： 0.150 INCH, TSOC-6
文件頁(yè)數(shù)： 26/30頁(yè)
文件大?。?/td> 165K
代理商： DS2432P
PRELIMINARY
DS2432
5 of 30
The secret can be installed either by copying data from the scratchpad to the secrets memory or by
computation using the current secret and the scratchpad contents as partial secret. The secret cannot be
read directly; only the SHA engine has access to it for computing message authentication codes.
The address range 0088h to 008Fh, also referred to as register page, contains special function registers as
well as general-purpose user-bytes and one factory byte. Once programmed to AAh or 55h, most of these
bytes become write-protected and can no longer be altered. All other codes will neither write-protect the
address nor activate the special function associated to that particular byte. Special functions are: 1) write-
protecting only the secret, 2) write-protecting all four data memory pages simultaneously, 3) activating
EPROM mode for data memory page 1 only, and 4) write-protecting data memory page 0 only. Once the
EPROM mode is activated, bits in the address range 0020h through 003Fh can only be altered from a
logic 1 to a logic 0, provided that the data memory is not write protected.
The factory byte will either read 55H or AAh. Typically, this address will read 55h, indicating that the
addresses 008E and 008F are read/write user-bytes without any special function or locking mechanism.
The code of AAh indicates that these two bytes are programmed with a 16-bit manufacturer ID and then
write-protected at the factory. The manufacturer ID can be a customer-supplied identification code that
assists the application software in identifying the product the DS2432 is associated with and in faster
selection of the applicable secret. To setup and register a manufacturer ID contact the factory.
The address range 0090h to 0097h provides an alternate way to read the device’s ROM registration
number. The family code is stored at the lower address followed by the 48-bit serial number and the 8-bit
CRC, which is stored at address 0097h. In reading through these addresses (0090h to 0097h) the bus
master will receive the individual bits of the registration number in exactly the same sequence as with a
ROM function command.
ADDRESS REGISTERS Figure 6
Bit #
765
43210
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)
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
相關(guān)PDF資料
PDF描述
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
DS2434 SPECIALTY MEMORY CIRCUIT, PBCY3
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2432P R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P T 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P/T&R 功能描述:電可擦除可編程只讀存儲(chǔ)器 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
DS2432P+ 制造商:Maxim Integrated Products 功能描述:EEPROM SERL-1WIRE 1KBIT 4PAGES X 256 3.3V/5V 6PIN TSOC - Rail/Tube 制造商:Maxim Integrated Products 功能描述:1-WIRE 1KB EE W/SHA-1 TSOC PBFREE 制造商:Maxim Integrated Products 功能描述:EEPROM 1KB 1-WIRE 6TSOC 制造商:Maxim Integrated Products 功能描述:EEPROM, 1KB, 1-WIRE, 6TSOC 制造商:Maxim Integrated Products 功能描述:OPTOCOUPLERS; Memory Size:1Kbit; Memory Configuration:256 x 4; Supply Voltage Min:2.8V; Supply Voltage Max:5.25V; Memory Case Style:TSOC; No. of Pins:6; IC Interface Type:Serial; Operating Temperature Min:-40C ;RoHS Compliant: Yes
DS2432P+R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
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