MC68HC908QT2CPE Freescale, MC68HC908QT2CPE Datasheet - Page 38
MC68HC908QT2CPE
Manufacturer Part Number
MC68HC908QT2CPE
Description
Manufacturer
Freescale
Datasheet
1.MC68HC908QT2CPE.pdf
(184 pages)
Specifications of MC68HC908QT2CPE
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Total Internal Ram Size
128Byte
# I/os (max)
6
Number Of Timers - General Purpose
2
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
4-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
8
Package Type
PDIP
Program Memory Type
Flash
Program Memory Size
1.5KB
Lead Free Status / RoHS Status
Compliant
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Memory
2.6.6 FLASH Block Protect Register
The FLASH block protect register is implemented as a byte within the FLASH memory, and therefore can
only be written during a programming sequence of the FLASH memory. The value in this register
determines the starting address of the protected range within the FLASH memory.
BPR[7:0] — FLASH Protection Register Bits [7:0]
38
These eight bits in FLBPR represent bits [13:6] of a 16-bit memory address. Bits [15:14] are 1s and
bits [5:0] are 0s.
The resultant 16-bit address is used for specifying the start address of the FLASH memory for block
protection. The FLASH is protected from this start address to the end of FLASH memory, at $FFFF.
With this mechanism, the protect start address can be XX00, XX40, XX80, or XXC0 within the FLASH
memory. See
Write to this register is by a programming sequence to the FLASH memory.
Address:
FLASH BLOCK PROTECT
Reset:
Read:
Write:
$BC (1011 1100)
$DE (1101 1110)
Figure 2-6
$BA (1011 1010)
$BB (1011 1011)
$DF (1101 1111)
$FE (1111 1110)
$B9 (1011 1001)
START ADDRESS OF
BPR[7:0]
$00–$B8
$FF
$FFBE
BPR7
Bit 7
Figure 2-5. FLASH Block Protect Register (FLBPR)
Figure 2-6. FLASH Block Protect Start Address
Table 2-2. Examples of Protect Start Address
and
BPR6
MC68HC908QY/QT Family Data Sheet, Rev. 6
Table
6
1
1
FLBPR, internal oscillator trim values, and vectors are protected
2-2.
Unaffected by reset. Initial value from factory is 1.
BPR5
5
The entire FLASH memory is not protected.
16-BIT MEMORY ADDRESS
and so on...
The entire FLASH memory is protected.
Start of Address of Protect Range
FLBPR VALUE
BPR4
4
$EEC0 (1110 1110 1100 0000)
$EE40 (1110 1110 0100 0000)
$EE80 (1110 1110 1000 0000)
$EF00 (1110 1111 0000 0000)
$F7C0 (1111 0111 1100 0000)
$F780 (1111 0111 1000 0000)
$FF80 (1111 1111 1000 0000)
BPR3
3
BPR2
0
2
0
0
BPR1
1
0
Freescale Semiconductor
0
BPR0
Bit 0
0
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