HCS08 datasheet(60/290 Pages) MOTOROLA

60 / 290 page

Memory

MC9S08GB/GT

MOTOROLA

Figure 4-7 FLASH Protection Register (FPROT)

FPOPEN — Open Unprotected FLASH for Program/Erase

1 = Any FLASH location, not otherwise block protected or secured, may be erased or programmed.

0 = Entire FLASH memory is block protected (no program or erase allowed).

FPDIS — FLASH Protection Disable

1 = No FLASH block is protected.

0 = FLASH block specified by FPS2:FPS0 is block protected (program and erase not allowed).

FPS2:FPS1:FPS0 — FLASH Protect Size Selects

When FPDIS = 0, this 3-bit field determines the size of a protected block of FLASH locations at the

high address end of the FLASH (see Table 4-8). Protected FLASH locations cannot be erased or

programmed.

Bit 7

54321

Bit 0

Read: FPOPEN

FPDIS

FPS2

FPS1

FPS0

Write:

(1)

NOTES:

1. Background commands can be used to change the contents of these bits in FPROT.

(1)

Reset:

This register is loaded from nonvolatile location NVPROT during reset.

= Unimplemented or Reserved

Table 4-8 High Address Protected Block

FPS2:FPS1:FPS0

Protected Address Range

Protected Block Size

Redirected Vectors(1)

NOTES:

1. No redirection if FPOPEN = 0, or FNORED = 1.

0:0:0

$FE00–$FFFF

512 bytes

$FDC0–$FDFD(2)

2. Reset vector is not redirected.

0:0:1

$FC00–$FFFF

1 Kbytes

$FBC0–$FBFD

0:1:0

$F800–$FFFF

2 Kbytes

$F7C0–$F7FD

0:1:1

$F000–$FFFF

4 Kbytes

$EFC0–$EFFD

1:0:0

$E000 - $FFFF

8 Kbytes

$DFC0–$DFFD

1:0:1

$C000 - $FFFF

16 Kbytes

$BFC0–$BFFD

1:1:0

$8000 - $FFFF

32 Kbytes

$7FC0–$7FFD

1:1:1

$8000 - $FFFF

32 Kbytes

$7FC0–$7FFD

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