24AA32A-P MICROCHIP [Microchip Technology], 24AA32A-P Datasheet - Page 9

• Manufacturer Part Number: 24AA32A-P
• Description: 32K 1.8V I 2 C O Serial EEPROM
• Manufacturer: MICROCHIP [Microchip Technology]

7.0
7.1
The A0..A2 inputs are used by the 24AA32A for multi-
ple device operation and conform to the 2-wire bus
standard. The levels applied to these pins define the
address block occupied by the device in the address
map. A particular device is selected by transmitting the
corresponding bits (A2, A1, A0) in the control byte
(Figure 3-3).
7.2
This is a Bi-directional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pullup
resistor to V
kHz)
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL HIGH are
reserved for indicating the START and STOP condi-
tions.
7.3
This input is used to synchronize the data transfer from
and to the device.
7.4
This pin must be connected to either V
If tied to V
(read/write the entire memory 000-FFF).
If tied to V
entire memory will be write-protected. Read operations
are not affected.
1996 Microchip Technology Inc.
PIN DESCRIPTIONS
A0, A1, A2 Chip Address Inputs
SDA Serial Address/Data Input/Output
SCL Serial Clock
WP
SS
CC
CC
, normal memory operation is enabled
, WRITE operations are inhibited. The
(typical 10K for 100 kHz, 1K for 400
SS
or V
CC
.
Preliminary
8.0
The SCL and SDA inputs have filter circuits which sup-
press noise spikes to ensure proper device operation
even on a noisy bus. All I/O lines incorporate Schmitt
triggers for 400 kHz (Fast Mode) compatibility.
9.0
This design incorporates a power standby mode when
the device is not in use and automatically powers off
after the normal termination of any operation when a
stop bit is received and all internal functions are com-
plete. This includes any error conditions, i.e., not receiv-
ing an acknowledge or stop condition per the 2-wire bus
specification. The device also incorporates V
circuitry to prevent inadvertent writes (data corruption)
during low-voltage conditions. The V
is powered off when the device is in standby mode in
order to further reduce power consumption.
NOISE PROTECTION
POWER MANAGEMENT
24AA32A
DD
DS21162B-page 9
monitor circuitry
DD
monitor