M34C02-RDW6TP STMicroelectronics

M34C02-R 2 Kbit serial IC bus EEPROM for DIMM serial presence detect Features Software data protection for lower 128 bytes 2 Two-wire I C serial interface 400 kHz transfer rates Single supply voltage: 1.8 V to 5.5 V Byte and Page Write (up to 16 bytes) TSSOP8 (DW) Random and Sequential Read modes 169 mil width Self-timed programming cycle Automatic address incrementing Enhanced ESD/latch-up protection More than 1 million write cycles More than 40 year data retention Packages ECOPACK (RoHS compliant) UFDFPN8 (MB) 2 x 3 mm (MLP) March 2009 Rev 11 1/29 www.st.com 1 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Contents M34C02-R Contents 1 Description . 6 2 Signal description . 8 2.1 Serial Clock (SCL) . 8 2.2 Serial Data (SDA) 8 2.3 Chip Enable (E0, E1, E2) 8 2.4 Write Control (WC) . 8 2.5 V ground . 9 SS 2.6 Supply voltage (V ) . 9 CC 2.6.1 Operating supply voltage V CC 9 2.6.2 Internal device reset 9 2.6.3 Power-down . 9 3 Device operation . 11 3.1 Start condition . 11 3.2 Stop condition . 11 3.3 Acknowledge bit (ACK) . 11 3.4 Data input . 11 3.5 Memory addressing . 12 3.6 Setting the software write-protection 13 3.7 Write operations 14 3.7.1 Byte Write . 14 3.7.2 Page Write . 14 3.7.3 Minimizing system delays by polling on ACK . 16 3.8 Read operations 17 3.8.1 Random Address Read . 17 3.8.2 Current Address Read 17 3.8.3 Sequential Read 17 3.8.4 Acknowledge in Read mode . 17 4 Use within a DRAM DIMM 19 4.1 Programming the M34C02-R 19 2/29 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)