FM24C32A Shanghai Fudan Microelectronics Co., Ltd., FM24C32A Datasheet - Page 5

• Manufacturer Part Number: FM24C32A
• Description: 2-wire Serial Eeprom
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

Pin Description
SERIAL CLOCK (SCL): The SCL input is used to
positive edge clock data into each EEPROM device
and negative edge clock data out of each device.
SERIAL DATA (SDA): The SDA pin is bi-directional
for serial data transfer. This pin is open-drain driven
and may be wire-ORed with any number of other
open-drain or open-collector devices.
DEVICE/PAGE ADDRESSES (A2, A1, A0): The A2,
A1 and A0 pins are device address inputs that are
hardwired or left not connected for hardware
compatibility with other FM24CXX ／ FM24CXX
devices. When the pins are hardwired, as many as
eight 32K/64K devices may be addressed on a
single bus system (device addressing is discussed in
detail under the Device Addressing section). If the
pins are left floating, the A2, A1 and A0 pins will be
Write Protect Description
Memory Organization
FM24C32A, 32K SERIAL EEPROM: Internally
organized with 128 pages of 32 bytes each, the
32K requires a 12-bit data word address for
random word addressing.
FM24C32A/64A 2-Wire Serial EEPROM
WP Pin Status
WP=GND
WP=V
CC
Full (32K) Memory
FM24C32A
Part of the Memory Protected
Normal Read/Write Operations
internally pulled down to GND if the capacitive
coupling to the circuit board V
coupling is >3pF, FMSH recommends connecting
the address pins to GND.
WRITE PROTECT (WP): The FM24C32A/64A has a
Write Protect pin that provides hardware data
protection. The WP pin allows normal write
operations when connected to ground (GND).
When the Write Protect pin is connected to V
write operations to the memory are inhibited. If the
pin is left floating, the WP pin will be internally
pulled
recommends
Switching WP to V
creates a software write protected function.
.
FM24C64A, 64K SERIAL EEPROM: Internally
organized with 256 pages of 32 bytes each, the 64K
requires a 13-bit data word address for random word
addressing.
Ver 1.2
is<3pF,
connecting
if
CC
coupling
Full (64K) Memory
prior to a write operation
FM 24C64A
the
CC
is
plane is <3pF, if
pins
>3pF,
Data Sheet
to
FMSH
GND.
CC,
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all