MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 47
MC908AP32CFBE
Manufacturer Part Number
MC908AP32CFBE
Description
Manufacturer
Freescale
Datasheet
1.MC908AP32CFBE.pdf
(324 pages)
Specifications of MC908AP32CFBE
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Interface Type
SCI/SPI
Total Internal Ram Size
2KB
# I/os (max)
32
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
PQFP
Program Memory Type
Flash
Program Memory Size
32KB
Lead Free Status / RoHS Status
Compliant
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2.5.7 FLASH Block Protect Register
The FLASH block protect register is implemented as an 8-bit I/O register. The value in this register
determines the starting address of the protected range within the FLASH memory.
BPR[7:0] — FLASH Block Protect Bits
Freescale Semiconductor
BPR[7:1] represent bits [15:9] of a 16-bit memory address. Bits [8:0] are logic 0’s.
BPR0 is used only for BPR[7:0] = $FF, for no block protection.
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 $FFFF.
With this mechanism, the protect start address can be X000, X200, X400, X0600, X800, XA00, XC00,
or XE00 (at page boundaries — 512 bytes) within the FLASH memory.
Examples of protect start address:
Address:
and so on...
1. Except for the mask option register ($FFCF) and the 48-byte user vectors
Reset:
Read:
Write:
$FC or $FD or $FE
Start address of FLASH block protect
($FFD0–$FFFF). These FLASH locations are always protected.
(1111 1101x)
(0000 101x)
(0000 110x)
$0C or $0D
$0A or $0B
$FA or $FB
$00 to $09
BPR[7:0]
$FF
$FE09
BPR7
Bit 7
0
Figure 2-5. FLASH Block Protect Register (FLBPR)
Table 2-2 FLASH Block Protect Range
BPR6
6
0
MC68HC908AP Family Data Sheet, Rev. 4
BPR5
5
0
The entire FLASH memory is NOT protected.
The entire FLASH memory is protected.
BPR4
4
0
BPR[7:1]
Protected Range
$FFCF to $FFFF
$0C00 to $FFFF
$0A00 to $FFFF
$FA00 to $FFFF
BPR3
3
0
16-bit memory address
BPR2
0 0 0 0 0 0 0 0 0
2
0
BPR1
1
0
(1)
BPR0
Bit 0
0
FLASH Memory
47
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