Saxperience - Citroen Saxo Forum - View Single Post - ECU EPROM Chip

Mikol · 9th June 2011, 20:56

512Kbit is only 64kb, in real money. The spec for the chip suggests it stores 64,000 8-bit entries.

Considering a map has 3 components - RPM, Load and Fuel

From what I can tell an engine map for this KMS - http://forum.205gtidrivers.com/index...howtopic=67871 would require a 25 x 15 data grid, each containing a 8 bit value (although the ones in this particular example are 3sf decimals, surely this would require 16 bit data else you'd be limited to a maximum value of 25.6?)

Anyway, 25x15 is much less than 64000 (375). Even with 16-bit data that's still only 750b of information, ~10% of the total EPROM storage.

9th June 2011, 20:56	#6
Mikol Established Member Join Date: Jun 2008 Location: Somewhere between Bedford and Brixworth Posts: 2,373 Car(s): 106 XS 16v Driveway Ornament iTrader Score: 12 (100%)	512Kbit is only 64kb, in real money. The spec for the chip suggests it stores 64,000 8-bit entries. Considering a map has 3 components - RPM, Load and Fuel From what I can tell an engine map for this KMS - http://forum.205gtidrivers.com/index...howtopic=67871 would require a 25 x 15 data grid, each containing a 8 bit value (although the ones in this particular example are 3sf decimals, surely this would require 16 bit data else you'd be limited to a maximum value of 25.6?) Anyway, 25x15 is much less than 64000 (375). Even with 16-bit data that's still only 750b of information, ~10% of the total EPROM storage. __________________ White 106 1.6 XS 16v - 106oc Flat Arch of the Year 2012 Cobalt 106 1.1 - 106oc Flat Arch of the Year 2010