MC68HC908GR8CD Freescale Semiconductor, MC68HC908GR8CD Datasheet - Page 115

• Manufacturer Part Number: MC68HC908GR8CD
• Description: 8-bit Microcontrollers - MCU 8 Bit 8MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908GR8CD

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: HC08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 384 B
• Operating Supply Voltage: 3 V to 5 V
• Package / Case: SOIC-28
• Mounting Style: SMD/SMT
• Data Rom Size: 64 KB
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 21
• Program Memory Type: Flash

Examples of protect start address:
11.8 Wait Mode
Putting the MCU into wait mode while the FLASH is in read mode does not affect the operation of the
FLASH memory directly, but there will not be any memory activity since the CPU is inactive.
The WAIT instruction should not be executed while performing a program or erase operation on the
FLASH, otherwise the operation will discontinue, and the FLASH will be on Standby Mode.
11.9 STOP Mode
Putting the MCU into stop mode while the FLASH is in read mode does not affect the operation of the
FLASH memory directly, but there will not be any memory activity since the CPU is inactive.
The STOP instruction should not be executed while performing a program or erase operation on the
FLASH, otherwise the operation will discontinue, and the FLASH will be on Standby Mode
Freescale Semiconductor
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, and $XXC0 (64 bytes
page boundaries) within the FLASH memory.
Note: The end address of the protected range is always $FFFF.
Standby Mode is the power saving mode of the FLASH module in which all
internal control signals to the FLASH are inactive and the current
consumption of the FLASH is at a minimum.
Start address of FLASH block protect
$FE (1111 1110)
$81 (1000 0001)
$82 (1000 0010)
BPR[7:0]
$80
$FF
Figure 11-4. FLASH Block Protect Start Address
Table 11-1. Examples of Protect Start Address
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
1
1
The entire FLASH memory is not protected.
and so on...
The entire FLASH memory is protected.
NOTE
Start of Address of Protect Range
$E040 (1110 0000 0100 0000)
$E080 (1110 0000 1000 0000)
$FF80 (1111 1111 1000 0000)
FLBPR value
16-bit memory address
0 0 0 0 0 0
Wait Mode
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