11AA020-I/P Microchip Technology, 11AA020-I/P Datasheet - Page 16

• Manufacturer Part Number: 11AA020-I/P
• Description: IC EEPROM 2KBIT 100KHZ 8DIP
• Manufacturer: Microchip Technology

Specifications of 11AA020-I/P

• Memory Size: 2K (256 x 8)
• Package / Case: 8-DIP (0.300", 7.62mm)
• Operating Temperature: -40°C ~ 85°C
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 100kHz
• Interface: UNI/O™ (Single Wire)
• Voltage - Supply: 1.8 V ~ 5.5 V
• Organization: 256 x 8
• Interface Type: Serial
• Maximum Clock Frequency: 100 KHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Current: 50 uA
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

UNI/O
10.0
Slave devices must respond with a SAK if either a MAK
or NoMAK is received following the device address, as
long as the address is valid. In the case of a NoMAK,
the slave device will return to Standby mode immedi-
ately following the transmission of the SAK.
This feature allows the master to perform an address
polling sequence in order to determine what devices
are connected to the bus. Such a sequence is typically
used in conjunction with a list of expected device
addresses to allow for added flexibility in system
design.
FIGURE 10-1:
DS22076D-page 16
SCIO
SCIO
DEVICE ADDRESS POLLING
®
Standby Pulse
Standby Pulse
Bus
DEVICE ADDRESS POLLING EXAMPLE
0
0
Start Header
Start Header
1
1
0
0
1
1
0
0
1
1
In order to perform device address polling, the master
generates a standby pulse and start header and trans-
mits the desired device address followed by a NoMAK.
The master then checks to see whether or not a corre-
sponding slave transmits a SAK. If a SAK is received,
then a slave exists with the specified device address.
Note that a standby pulse must be generated before
every command, as a different device is being
addressed during each sequence.
Figure 10-1 shows an example of polling for two
devices, both with 8-bit device addresses. In this exam-
ple, the first device exists on the bus and the second
device does not exist. For 12-bit addressing, the
sequence is the same except that the SAK is checked
following the device low address.
0
0
1
1
1
1
Device Address 1
Device Address 2
0
0
1
1
0
0
© 2009 Microchip Technology Inc.
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0
0
0
0
0
0
1