AT24C256C
Pin Descriptions
while output data on the SDA pin is clocked out on the falling edge of SCL. The SCL pin must either be
forced high when the serial bus is idle or pulled high using an external pull‑up resistor.
2.5
Write-Protect (WP)
The write-protect input, when connected to GND, allows normal write operations. When the WP pin is
connected directly to V
CC
, all write operations to the protected memory are inhibited.
If the pin is left floating, the WP pin will be internally pulled down to GND. However, due to capacitive
coupling that may appear in customer applications, Microchip recommends always connecting the WP
pin to a known state. When using a pull‑up resistor, Microchip recommends using 10 kΩ or less.
Table 2-2. Write-Protect
WP Pin Status
At V
CC
At GND
Part of the Array Protected
Full Array
Normal Write Operations
2.6
Device Power Supply
The V
CC
pin is used to supply the source voltage to the device. Operations at invalid V
CC
voltages may
produce spurious results and should not be attempted.
©
2018 Microchip Technology Inc.
Datasheet
DS20006042A-page 6
MICROCHIP [ MICROCHIP TECHNOLOGY ]
