资料介绍
The Microchip Technology Inc. 24LCS21A is a
128 x 8-bit dual-mode Electrically Erasable PROM.
This device is designed for use in applications
requiring storage and serial transmission of configuration
and control information. Two modes of operation
have been implemented: Transmit-Only mode and
Bidirectional mode. Upon power-up, the device will be
in the Transmit-Only mode, sending a serial bit stream
of the memory array from 00h to 7Fh, clocked by the
VCLK pin. A valid high-to-low transition on the SCL
pin will cause the device to enter the Transition mode
and look for a valid control byte on the I2C bus. If it
detects a valid control byte from the master, it will
switch into Bidirectional mode, with byte selectable
read/write capability of the memory array using SCL.
If no control byte is received, the device will revert to
the Transmit-Only mode after it receives 128 consecutive
VCLK pulses while the SCL pin is idle. The
24LCS21A also enables the user to write-protect the
entire memory array using its write-protect pin. The
24LCS21A is available in a standard 8-pin PDIP and
SOIC package in industrial temperature range.
128 x 8-bit dual-mode Electrically Erasable PROM.
This device is designed for use in applications
requiring storage and serial transmission of configuration
and control information. Two modes of operation
have been implemented: Transmit-Only mode and
Bidirectional mode. Upon power-up, the device will be
in the Transmit-Only mode, sending a serial bit stream
of the memory array from 00h to 7Fh, clocked by the
VCLK pin. A valid high-to-low transition on the SCL
pin will cause the device to enter the Transition mode
and look for a valid control byte on the I2C bus. If it
detects a valid control byte from the master, it will
switch into Bidirectional mode, with byte selectable
read/write capability of the memory array using SCL.
If no control byte is received, the device will revert to
the Transmit-Only mode after it receives 128 consecutive
VCLK pulses while the SCL pin is idle. The
24LCS21A also enables the user to write-protect the
entire memory array using its write-protect pin. The
24LCS21A is available in a standard 8-pin PDIP and
SOIC package in industrial temperature range.
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