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PDF 24C01SC Data sheet ( Hoja de datos )
| Número de pieza | 24C01SC | |
| Descripción | 1K/2K 5.0V I2C Serial EEPROMs | |
| Fabricantes | MicrochipTechnology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 24C01SC (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Not recommended for new designs –
Please use 24LC01SC or 24LC02SC.
24C01SC/24C02SC
1K/2K 5.0V I2C™ Serial EEPROMs for Smart Cards
Features:
• ISO Standard 7816 pad locations
• Low-power CMOS technology
- 1 mA active current typical
- 10 µA standby current typical at 5.5V
• Organized as a single block of 128 bytes (128 x 8)
or 256 bytes (256 x 8)
• 2-wire serial interface bus, I2C™ compatible
• 100 kHz and 400 kHz compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
• 2 ms typical write cycle time for page-write
• ESD protection > 4 kV
• 1,000,000 E/W cycles ensured
• Data retention > 200 years
• Available for extended temperature ranges
- Commercial (C):
0°C to +70°C
Description:
The Microchip Technology Inc. 24C01SC and
24C02SC are 1K-bit and 2K-bit Electrically Erasable
PROMs with bondpad positions optimized for smart
card applications. The devices are organized as a
single block of 128 x 8-bit or 256 x 8-bit memory with a
two-wire serial interface. The 24C01SC and 24C02SC
also have page-write capability for up to 8 bytes of data.
Die Layout
VSS
VCC
SDA
DC
SCL
Block Diagram
I/O
Control
Logic
Memory
Control
Logic
XDEC
SDA SCL
VCC
VSS
HV Generator
EEPROM
Array
Page Latches
YDEC
Sense Amp
R/W Control
I2C is a trademark of Philips Corporation.
2004 Microchip Technology Inc.
DS21170E-page 1
1 page  
3.6 Slave Address
After generating a Start condition, the bus master trans-
mits the slave address consisting of a 4-bit device code
(1010) for the 24C01SC/02SC, followed by three “don't
care” bits.
The eighth bit of slave address determines if the master
device wants to read or write to the 24C01SC/02SC
(Figure 3-2).
The 24C01SC/02SC monitors the bus for its corre-
sponding slave address all the time. It generates an
Acknowledge bit if the slave address was true, and it is
not in a programming mode.
Operation
Read
Write
Control
Code
1010
1010
Chip
Select
xxx
xxx
R/W
1
0
FIGURE 3-2:
Start
CONTROL BYTE
ALLOCATION
Read/Write
SLAVE ADDRESS
R/W A
1 010x xx
X = don’t care
24C01SC/24C02SC
4.0 WRITE OPERATION
4.1 Byte Write
Following the Start signal from the master, the device
code (4 bits), the “don't care” bits (3 bits), and the R/W
bit, which is a logic low, is placed onto the bus by the
master transmitter. This indicates to the addressed
slave receiver that a byte with a word address will
follow after it has generated an Acknowledge bit during
the ninth clock cycle. Therefore, the next byte transmit-
ted by the master is the word address and will be
written into the address pointer of the 24C01SC/02SC.
After receiving another Acknowledge signal from the
24C01SC/02SC, the master device will transmit the
data word to be written into the addressed memory
location. The 24C01SC/02SC acknowledges again
and the master generates a Stop condition. This
initiates the internal write cycle, and during this time the
24C01SC/02SC will not generate Acknowledge signals
(Figure 4-1).
4.2 Page Write
The write control byte, word address, and the first data
byte are transmitted to the 24C01SC/02SC in the same
way as in a byte write. But instead of generating a Stop
condition, the master transmits up to eight data bytes to
the 24C01SC/02SC, which are temporarily stored in
the on-chip page buffer and will be written into the
memory after the master has transmitted a Stop condi-
tion. After the receipt of each word, the three lower
order address pointer bits are internally incremented by
one. The higher order five bits of the word address
remains constant. If the master should transmit more
than eight words prior to generating the Stop condition,
the address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the Stop condition is received an
internal write cycle will begin (Figure 4-2).
Note:
Page write operations are limited to writing
bytes within a single physical page,
regardless of the number of bytes actually
being written. Physical page boundaries
start at addresses that are integer multi-
ples of the page buffer size (or ‘page size’)
and end at addresses that are integer
multiples of [page size - 1]. If a page Write
command attempts to write across a
physical page boundary, the result is that
the data wraps around to the beginning of
the current page (overwriting data
previously stored there), instead of being
written to the next page as might be
expected. It is therefore necessary for the
application software to prevent page write
operations that would attempt to cross a
page boundary.
2004 Microchip Technology Inc.
DS21170E-page 5
5 Page 
ON-LINE SUPPORT
Microchip provides on-line support on the Microchip
World Wide Web site.
The web site is used by Microchip as a means to make
files and information easily available to customers. To
view the site, the user must have access to the Internet
and a web browser, such as Netscape® or Microsoft®
Internet Explorer. Files are also available for FTP
download from our FTP site.
Connecting to the Microchip Internet
Web Site
The Microchip web site is available at the following
URL:
www.microchip.com
The file transfer site is available by using an FTP
service to connect to:
ftp://ftp.microchip.com
The web site and file transfer site provide a variety of
services. Users may download files for the latest
Development Tools, Data Sheets, Application Notes,
User's Guides, Articles and Sample Programs. A vari-
ety of Microchip specific business information is also
available, including listings of Microchip sales offices,
distributors and factory representatives. Other data
available for consideration is:
• Latest Microchip Press Releases
• Technical Support Section with Frequently Asked
Questions
• Design Tips
• Device Errata
• Job Postings
• Microchip Consultant Program Member Listing
• Links to other useful web sites related to
Microchip Products
• Conferences for products, Development Systems,
technical information and more
• Listing of seminars and events
24C01SC/24C02SC
SYSTEMS INFORMATION AND
UPGRADE HOT LINE
The Systems Information and Upgrade Line provides
system users a listing of the latest versions of all of
Microchip's development systems software products.
Plus, this line provides information on how customers
can receive the most current upgrade kits. The Hot Line
Numbers are:
1-800-755-2345 for U.S. and most of Canada, and
1-480-792-7302 for the rest of the world.
042003
2004 Microchip Technology Inc.
DS21170E-page 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet 24C01SC.PDF ] | |
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