11AA040T-I/MS Microchip Technology, 11AA040T-I/MS Datasheet - Page 15

• Manufacturer Part Number: 11AA040T-I/MS
• Description: 4K, 512 X 8 1.8V SERIAL EE, IND 8 MSOP 3x3mm T/R
• Manufacturer: Microchip Technology

Specifications of 11AA040T-I/MS

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 4K (512 x 8)
• Speed: 100kHz
• Interface: UNI/O™ (Single Wire)
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.0
After the device address, a command byte must be
sent by the master to indicate the type of operation to
be performed. This command is defined at the device
level and no restrictions are placed on it by the bus.
A full operation can consist of any number of bytes,
ranging from a single command byte to a theoretically
unlimited maximum. After the initial command byte,
additional bytes can be included for any necessary
purpose, such as for addressing or data.
Regardless of the number of bytes required, all com-
mands are terminated through the transmission of a
NoMAK from the master.
FIGURE 9-1:
© 2009 Microchip Technology Inc.
SCIO
SCIO
SCIO
COMMAND STRUCTURE
0
7 6 5 4
Standby Pulse
0
Data Byte 1
0
Command
EXAMPLE EEPROM READ OPERATION
0
0
3 2 1 0
0
1
1
15 14 13 12
0
7 6 5 4
Start Header
Word Address MSB
1
Data Byte 2
0
1
11 10 9 8
0
3 2 1 0
1
A full operation consists of the following steps:
Figure 9-1 shows an example read operation for a
serial EEPROM.
• Standby Pulse
• Start Header
• Device Address
• Command Byte
• Any other bytes necessary for the operation
0
Note 1: A standby pulse may not be required for
1
consecutive commands to the same
device. Refer to Section 3.0 “Standby
Pulse” for more details.
1
7 6 5 4
Word Address LSB
0
(1)
7 6 5 4
Device Address
1
UNI/O
Data Byte n
0
A3 A2 A1 A0
3 2 1 0
3 2 1 0
DS22076D-page 15
®
Bus