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參數(shù)資料
| 型號： | DS1962 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1K-Bit Monetary iButton(1K位貨幣按鈕) |
| 中文描述： | 1K位貨幣iButton的（每1000位貨幣按鈕） |
| 文件頁數(shù)： | 3/22頁 |
| 文件大?。?/td> | 147K |
| 代理商： | DS1962 |
DS1962/DS1963
020698 3/22
DS196X BLOCK DIAGRAM
Figure 1
64-BIT
LASERED
ROM
1–WIRE
FUNCTION
CONTROL
MEMORY
FUNCTION
CONTROL
256–BIT
SCRATCHPAD
DATA
PARASITE–POWERED
CIRCUITRY
LID
CONTACT
LIT3V
MEMORY
4096–BIT
(DS1963)
1024–BIT
(DS1962)
SRAM
(256–BIT PAGES)
PAGE
WRITE CYCLE
COUNTERS
MEMORY
The memory map in Figure 5 shows a 32–byte page
called the scratchpad and additional 32 byte pages
called memory. The DS1962 contains pages 0 through
3 which make up the 1024–bit SRAM. The DS1963 con-
tains pages 0 through 15 which make up the 4096–bit
SRAM. The scratchpad is an additional page that acts
as a buffer when writing to memory.
ADDRESS REGISTERS AND TRANSFER
STATUS
Because of the serial data transfer, the DS196X
employs three address registers, called TA1, TA2 and
E/S (Figure 6). Registers TA1 and TA2 must be loaded
with the target address to which the data will be written
or from which data will be sent to the master upon a
Read command. Register E/S acts like a byte counter
and Transfer Status register. It is used to verify data
integrity with write commands. Therefore, the master
only has read access to this register. The lower five bits
of the E/S register indicate the address of the last byte
that has been written to the scratchpad. This address is
called Ending Offset. Bit 5 of the E/S register, called PF
or “partial byte flag,” is set if the number of data bits sent
by the master is not an integer multiple of 8. Bit 6 has no
function; it always reads 0. Note that the lowest five bits
of the target address also determine the address within
the scratchpad, where intermediate storage of data will
begin. This address is called byte offset. If the target
address (TA1) for a Write command is 03CH for exam-
ple, then the scratchpad will store incoming data begin-
ning at the byte offset 1CH and will be full after only four
bytes. The corresponding ending offset in this example
is 1FH. For best economy of speed and efficiency, the
target address for writing should point to the beginning
of a new page, i.e., the byte offset will be 0. Thus the full
32 byte capacity of the scratchpad is available, resulting
also in the ending offset of 1FH. However, it is possible
to write one or several contiguous bytes somewhere
within a page. The ending offset together with the Partial
Flag support the master checking the data integrity after
a Write command. The highest valued bit of the E/S reg-
ister, 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.
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| DS1963 | 4K-Bit Monetary iButton(4K位貨幣按鈕) |
| DS1981U | UniqueWare iButton(唯一貨品按鈕) |
| DS1982U | UniqueWare iButton(UniqueWare iButton標準的EPROM) |
| DS1982 | UniqueWare iButton(UniqueWare iButton標準的EPROM) |
| DS1985 | UniqueWare iButton(唯一貨品按鈕) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1963L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4 kbit Monetary iButton |
| DS1963L-F5 | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1963L-F5+ | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1963L-F5+W | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1963R-F5+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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