MC908QB8CDWE Freescale Semiconductor, MC908QB8CDWE Datasheet - Page 36

IC MCU 8BIT 8K FLASH 16-SOIC

MC908QB8CDWE

Manufacturer Part Number
MC908QB8CDWE
Description
IC MCU 8BIT 8K FLASH 16-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC908QB8CDWE

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
16-SOIC (0.300", 7.5mm Width)
Processor Series
HC08QB
Core
HC08
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SCI, SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
14
Number Of Timers
4
Operating Supply Voltage
3 V to 5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68CBL05AE, DEMO908QB8, DEMO908QC16
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
For Use With
DEMO908QB8 - BOARD DEMO FOR MC68HC908QB8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
 Details

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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]
36
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.
Reset:
Read:
Write:
FLASH BLOCK PROTECT
Figure 2-6
START ADDRESS OF
$DE (1101 1110)
$DF (1101 1111)
$7A (0111 1010)
$7B (0111 1011)
$FE (1111 1110)
$78 (0111 1000)
$79 (0111 1001)
BPR7
BPR[7:0]
$00–$77
Bit 7
$FF
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
6
Table
1
MC68HC908QB8 Data Sheet, Rev. 3
1
Unaffected by reset. Initial value from factory is 1.
2-2.
BPR5
5
FLBPR, internal oscillator trim value, and vectors are
The entire FLASH memory is not protected.
16-BIT MEMORY ADDRESS
and so on...
The entire FLASH memory is protected.
BPR4
Start of Address of Protect Range
FLBPR VALUE
4
$DFC0 (1101 1110 1100 0000)
$DE00 (1101 1110 0000 0000)
$DE40 (1101 1110 0100 0000)
$DE80 (1101 1110 1000 0000)
$F7C0 (1111 0111 1100 0000)
$F780 (1111 0111 1000 0000)
$FF80 (1111 1111 1000 0000)
BPR3
3
protected
BPR2
2
0
0
BPR1
0
1
0
Freescale Semiconductor
0
BPR0
Bit 0
0

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