M24LR64-RDW6T2 STMICROELECTRONICS [STMicroelectronics], M24LR64-RDW6T2 Datasheet - Page 14

• Manufacturer Part Number: M24LR64-RDW6T2
• Description: 64 Kbit EEPROM with password protection & dual interface
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Signal description
2
2.1
2.2
2.3
2.4
2.5
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Signal description
Serial Clock (SCL)
This input signal is used to strobe all data in and out of the device. In applications where this
signal is used by slave devices to synchronize the bus to a slower clock, the bus master
must have an open drain output, and a pull-up resistor must be connected from Serial Clock
(SCL) to V
most applications, though, this method of synchronization is not employed, and so the pull-
up resistor is not necessary, provided that the bus master has a push-pull (rather than open
drain) output.
Serial Data (SDA)
This bidirectional signal is used to transfer data in or out of the device. It is an open drain
output that may be wire-OR’ed with other open drain or open collector signals on the bus. A
pull up resistor must be connected from Serial Data (SDA) to V
the value of the pull-up resistor can be calculated).
Chip Enable (E0, E1)
These input signals are used to set the value that is to be looked for on the two least
significant bits (b2, b1) of the 7-bit device select code. These inputs must be tied to V
V
floating), these inputs are read as low (0,0).
Figure 3.
Antenna coil (AC0, AC1)
These inputs are used to connect the device to an external coil. When correctly tuned, the
coil is used to power and access the device using the ISO 15693 and ISO 18000-3 mode 1
protocols.
V
V
SS
SS
SS
, to establish the device select code as shown in
is the reference for the V
ground
CC
Device select code
.
(Figure 4
indicates how the value of the pull-up resistor can be calculated). In
CC
Doc ID 15170 Rev 10
supply voltage.
E i
M24xxx
V CC
V SS
E i
M24xxx
V CC
V SS
Figure
Ai12806
3. When not connected (left
CC
.
(Figure 4
indicates how
M24LR64-R
CC
or