mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 175

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908GP20
Freescale Semiconductor
Address
Write to
address
FLASH
Any
A14
A14
Bit
A9
A9
A6
A6
Address
Value
Any
1
0
1
0
1
0
—
Rev 2.1
BLK1
0
0
0
1
1
1
1
In step 4 of the erase operation, the desired erase addresses are latched
and used to determine the location of the block to be erased. For the full
array (BLK1 = BLK0 = 0), the only requirement is that the FLASH
memory be selected. Writing to any address in the range $B000 to
$FDFF or the vectors in the address range $FFDC to $FFFF will enable
the full array erase. This case is shown in
In the 4/5 array case in
state of A14 = 1 determines that the range from $C000 to $FDFF and
$FFDC to $FFFF is erased. For example, writing to address $D123
(A14 = 1, BLK1 = 0, BLK0 = 1) will erase the range $C000 to $FDFF and
BLK0
0
0
0
1
1
1
1
Table 11-2. Erase Block Sizes
–$<A15–A12><A11,A10,11><1111><1111>
–$<A15–A12><A11,A10,01><1111><1111>
$<A15–A12><A11,A10,10><0000><0000>
$<A15–A12><A11,A10,00><0000><0000>
–$<A15–A12><A11:A8><A7,111><1111>
–$<A15–A12><A11:A8><A7,011><1111>
$<A15–A12><A11:A8><A7,100><0000>
$<A15–A12><A11:A8><A7,000><0000>
Address range determined by value
Address range determined by value
Address range determined by value
Address range determined by value
$C000–$FDFF and $FFDC–$FFFF
$B000–$FDFF and $FFDC–$FFFF
Desired Erase Address Range
of A15–A10, while A9 = 1:
of A15–A10, while A9 = 0:
of A15–A7, while A6 = 1:
of A15–A7, while A6 = 0:
Table 11-2
$B000–$BFFF
(A14 = 1, BLK1 = 0, BLK0 = 1), the
Table
11-2.
Any FLASH Address)
Full array: 20 KBytes
Single row: 64 bytes
Single row: 64 bytes
4/5 array: 16 Kbytes
1/5 array: 4 Kbytes
Advance Information
(A14–A9, A9 = 1)
(A14–A9, A9 = 0)
(A14–A6, A6 = 1)
(A14–A6, A6 = 0)
Address Bits)
Array Size
Eight rows:
Eight rows:
512 bytes
512 bytes
(A14–A0,
(A14 = 1)
(A14 = 0)
(Critical
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