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EC24C08A Datasheet(PDF) 3 Page - E-CMOS Corporation |
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EC24C08A Datasheet(HTML) 3 Page - E-CMOS Corporation |
3 / 18 page EC24C02A/04A/08A/16A 2K/4K/8K/16K-bit 2-WIRE SERIAL CMOS EEPROM E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 18 5H06N-Rev.F004 Pin Descriptions DEVICE/PAGE ADDRESSES (A2, A1 and A0): The A2, A1 and A0 pins are device address inputs that are hard-wired for the EC24C02A. Eight 2K devices may be addressed on a single bus system (device addressing is discussed in detail under the Device Addressing section). The EC24C04A uses the A2 and A1 inputs for hard-wired addressing and a total of four 4K devices may be addressed on a single bus system. The A0 (P0) pin is a no connection or can be connected to ground. The EC24C08A only uses the A2 input for hard-wired addressing and a total of two 8K devices may be addressed on a single bus system. The A0 (P0) and A1 (P1) pins are no connections or can be connected to ground. The EC24C16A does not use the device address pins, which limits the number of devices on a single bus to one. The A0 (P0), A1 (P1), and A2 (P2) pins are no connections or can be connected to ground. SERIAL DATA (SDA): The SDA pin is bi-directional 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. 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. WRITE PROTECT (WP): The EC24C02A/04A/08A/16A has a Write Protect pin that provides hardware data protection. The Write Protect pin allows normal read/write operations when connected to ground (GND). When the Write Protect pin is connected to VCC, the write protection feature is enabled and operates as shown in the following. Write Protect WP Pin Status Part of the Array Protected EC24C02A EC24C04A EC24C08A EC24C16A At VCC Full (2K) Array Full (4K) Array Full (8K) Array Full (16K) Array At GND Normal Read / Write Operations Ordering Information |
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