ISSUED DATE :2006/06/14
REVISED DATE :
GTM
CORPORATION
Figure 2. Block Diagram
PIN Descriptions
Serial Data (SDA): The SDA pin used for sending and receiving data bits in serial mode. Since the SDA pin is
defined as an open-drain connection, a pull-up resistor is needed.
Serial Clock (SCL): The SCL input is used to synchronize data input and output with the clocked out on the
falling edge of SCL.
Device/Page Addresses (A2, A1, A0): The A2, A1, and A0 pins are used to address multiple devices on a
single bus system and should be hard-wired.
The GSC24BC01 and GSC24BC02 use the A2, A1 and A0 pins to provide the capability for addressing up
to eight 1K/2K devices on a single bus system (please see the Device Addressing section for further
details)
ԦThe GSC24BC04 uses the A2 and A1 inputs and a total of for 4K device may be addressed on a single
bus system. The A0 pin in not used, but should be grounded if possible.
ԦThe GSC24BC08 only uses the A2 input hardwire addressing. On a single bus system, a total of two 8K
devices may be addressed. The A0 and A1 pins are not used, but should be grounded if possible.
ԦThe GSC24BC16 does not uses the device address pins, so only one device can be connected to a
single bus system. Therefore, the A0, A1 and A2 pins are not used, but should be grounded if possible.
Write Protect (WP): The GSC24BC01/02/04/08/16 has a Write Protect pin that provides hardware data
protection. When connected to ground, the Write Protect pin allows for normal read/write operations. If the WP
pin is connected to VCC, no data can be overwritten.
GSC24BC01/02/02/04/08/16
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