I am trying to find the ROM based flash routines for a HC08QT4. I found the application notes for flash routines in ROM for several other versions of the HC08 but not the QT4. The ones listed do not point to any op-codes. There are several JMP codes in the ROM but I don't know what they are for.
Maybe there are no flash routines in ROM for the QT4 and I will just have to write the routines myself. I was trying to save room on the mpu. Does anyone know of any ROM routines on the QT4?
I've used the routines in a QY4, I believe they are the same as the QT4.
Get a copy of AN1831 if you haven't already. That note was written before they made the Qxy products, but is otherwise directly applicable. The routines are the same.
Motorola support provided me with the following table (cut and pasted from the email):
MCU's -> GR8 KX8 JL3/ JB8 GT16/ QY4.. JK3 GT8 QT1 =============================================== GETBYTE $1C99 $1000 $FC00 $FC00 $1B50 $2800 RDVRRNG $1CAD $1003 $FC03 $FC03 $1B53 $2803 ERARNGE $1DA0 $1006 $FC06 $FC06 $1B56 $2806 PRGRNGE $1CEC $1009 $FC09 $FC09 $1B59 $2809 DELNUS $1D96 $100C $FC0C $FC0C $1B5C $280C ICGTRIM $1330 $1B5F $280F ICGTEST $1369. $1B62 $2812
which doesn't line up on my screen, but I think you can figure it out. RAM, of course, starts at 0x80.
HTH, -=Dave
-=Dave
-- Change is inevitable, progress is not.
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