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Topics in Library web: Changed: now 12:50 GMT Changed by:
ChippingAn88-89ECU 21 Sep 2005 - 08:24 - r1.8 Home.1net
OBD0MPFI ECUs have two main designs that affect how the ECU is chipped. 90-91 ECU s have an external 38256 (same as 27C256 ) ROM . This can be removed and replaced ...  
McuReaders 05 Mar 2004 - 17:46 - r1.2 Home.blundar
All of the MCU readers described here take advantage of a design flaw of oki MCUs (and the design flaw is present on all MCUs we have seen to date). MCUs can use both ...  
OBD0Oki83C154Reader 05 Mar 2004 - 17:56 - NEW Home.blundar
Dave says: Well, borrowing an idea from Nico-HRED/Doc used in the 66Ks, here is a program that should read out the contents of a 83C154 MCU. It assumes that you have ...  
OBD1J1 19 Feb 2004 - 22:01 - NEW TWiki Guest
J1 on OBD1 ECU s controls the state of EA . It is used to change whether the MCU uses an external ROM or internal program.  
_EA 19 Feb 2004 - 22:01 - NEW TWiki Guest
EA (EA Prime) is a pin on the MCU that controls whether the MCU runs off Internal ROM or an external ROM chip. EA is pin 31 on 40-pin Intel8051 MCU s OBD1J1 J1 on ...  

Number of topics: 5

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