Freescale Semiconductor MCF51QE128RM Flash Module Reserved Memory Locations, 0x0 0x1 0x2 0x3

Chapter 4 Memory

Table 4-3. High-Page Register Summary (Sheet 5 of 5)

Address	Register	Bit 7	6	5	4	3	2	1	Bit 0
	Name
0x(FF)FF_9870	SCI2BDH	LBKDIE	RXEDGIE	0			SBR[12:8]
	SCI2BDL
0x(FF)FF_9871					SBR[7:0]
	SCI2C1
0x(FF)FF_9872		LOOPS	SCISWAI	RSRC	M	WAKE	ILT	PE	PT
	SCI2C2
0x(FF)FF_9873		TIE	TCIE	RIE	ILIE	TE	RE	RWU	SBK
	SCI2S1
0x(FF)FF_9874		TDRE	TC	RDRF	IDLE	OR	NF	FE	PF
	SCI2S2
0x(FF)FF_9875		LBKDIF	RXEDGIF	0	RXINV	RWUID	BRK13	LBKDE	RAF
	SCI2C3
0x(FF)FF_9876		R8	T8	TXDIR	TXINV	ORIE	NEIE	FEIE	PEIE
	SCI2D
0x(FF)FF_9877		Bit 7	6	5	4	3	2	1	Bit 0
	PTCSET
0x(FF)FF_9878		PTCSET7	PTCSET6	PTCSET5	PTCSET4	PTCSET3	PTCSET2	PTCSET1	PTCSET0
	PTESET
0x(FF)FF_9879		PTESET7	PTESET6	PTESET5	PTESET4	PTESET3	PTESET2	PTESET1	PTESET0
	PTCCLR
0x(FF)FF_987A		PTCCLR7	PTCCLR6	PTCCLR5	PTCCLR4	PTCCLR3	PTCCLR2	PTCCLR1	PTCCLR0
	PTECLR
0x(FF)FF_987B		PTECLR7	PTECLR6	PTECLR5	PTECLR4	PTECLR3	PTECLR2	PTECLR1	PTECLR0
	PTCTOG
0x(FF)FF_987C		PTCTOG7	PTCTOG6	PTCTOG5	PTCTOG4	PTCTOG3	PTCTOG2	PTCTOG1	PTCTOG0
	PTETOG
0x(FF)FF_987D		PTETOG7	PTETOG6	PTETOG5	PTETOG4	PTETOG3	PTETOG2	PTETOG1	PTETOG0
0x(FF)FF_987E-	Reserved
		—	—	—	—	—	—	—	—
0x(FF)FF_987F

4.2.1Flash Module Reserved Memory Locations

Several reserved flash memory locations, shown in Table 4-4, are used for storing values used by corresponding peripheral registers. These registers include an 8-byte backdoor key that can be used to gain access to secure memory resources. During reset events, the contents of the flash protection byte (NVPROT) and flash nonvolatile byte (NVOPT) in the reserved flash memory are transferred into the corresponding FPROT and FOPT registers in the high-page register area to control security and block protection options.

Table 4-4. Reserved Flash Memory Addresses

Address	MSB1				LSB2
	(0x0)		(0x1)	(0x2)	(0x3)
0x(00)00_03FC		Reserved		FTRIM	TRIM
				(bit 0)
0x(00)00_0400			Backdoor comparison key bytes 0–3
	byte0		byte1	byte2	byte3
0x(00)00_0404			Backdoor comparison key bytes 4–7
	byte4		byte5	byte6	byte7

MCF51QE128 MCU Series Reference Manual, Rev. 3

Freescale Semiconductor 67

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