AT24C01B ATMEL [ATMEL Corporation], AT24C01B Datasheet - Page 3

• Manufacturer Part Number: AT24C01B
• Description: Two-wire Serial EEPROM
• Manufacturer: ATMEL [ATMEL Corporation]

Pin Description
Memory Organization
5156B–SEEPR–5/06
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each
EEPROM device and negative edge clock data out of each device.
SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is
open-drain driven and may be wire-ORed with any number of other open-drain or open-
collector devices.
DEVICE/PAGE ADDRESSES (A2, A1, A0): The A2, A1 and A0 pins are device
address inputs that are hard wired for the AT24C01B. As many as eight 1K devices may
be addressed on a single bus system (device addressing is discussed in detail under
the Device Addressing section).
WRITE PROTECT (WP): The AT24C01B has a write protect pin that provides hardware
data protection. The write protect pin allows normal read/write operations when con-
nected to ground (GND). When the write protect pin is connected to V
protection feature is enabled and operates as shown in Table 2.
Table 2. Write Protect
AT24C01B, 1K SERIAL EEPROM: Internally organized with 16 pages of 8 bytes each,
the 1K requires an 7-bit data word address for random word addressing. (See Figure 8
on page 11)
WP Pin
Status
At V
At GND
CC
Full (1K) Array
Normal Read/Write Operations
Part of the Array Protected
24C01B
AT24C01B [Preliminary]
CC
, the write
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