Just curious why you need two PICs to do that. A couple people pointed to these types of devices for fast writes. And some of them are good for a 100 trillion read/writes (wonder who had to count those).
http://www.ramtron.com/products/nonv...ry/serial.aspx (The 3volt type are even faster)
Ramtron FM24W256
256Kbit Ferroelectric Nonvolatile RAM
Organized as 32,768 x 8 bits
High Endurance 100 Trillion (1e14) Read/Writes
38 year Data Retention
NoDelay Writes
Advanced High-Reliability Ferroelectric Process
Fast Two-wire Serial Interface
Up to 1 MHz Maximum Bus Frequency
Supports Legacy Timing for 100 kHz & 400 kHz
Low Power Operation
Wide Voltage Operation 2.7V-5.5V
100 uA Active Current (100 kHz)
15 uA Standby Current (typ.)
Industry Standard Configuration
Industrial Temperature -40°C to +85°C
8-pin SOIC (-G)
8-pin EIAJ SOIC (-EG)
Ordering Information
FM24W256-G (8-pin "Green"/RoHS SOIC)
FM24W256-EG (8-pin "Green"/RoHS EIAJ SOIC)
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