MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 195

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

(1) This register is implemented in EEPROM; therefore reset has no effect on the individual bits.
B.6
EE1P – EEPROM protect bit
In order to achieve a higher degree of protection, the EEPROM is split into two parts, both working
from the VPP1 charge pump. Part 1 of the EEPROM array (32 bytes from $0100 to $011F) cannot
be protected; part 2 (224 bytes from $0120 to $01FF) is protected by the EE1P bit in the options
register.
When this bit is set (erased), the protection will remain until the next power-on or external reset.
EE1P can only be written to ‘0’ when the E1LAT bit in the EEPROM control register is set.
Note:
SEC — Secure bit
This bit allows the EPROM and EEPROM1 to be secured from external access. When this bit is in
the erased state (set), the EPROM and EEPROM1 content is not secured and the device may be
used in non user mode. When the SEC bit is programmed to ‘zero’, the EPROM and EEPROM1
content is secured by prohibiting entry to the non user mode. To deactivate the secure bit, the
EPROM has to be erased by exposure to a high density ultraviolet light, and the device has to be
entered into the EPROM erase verification mode with PD1 set. When the SEC bit is changed, its
new value will have no effect until the next power-on or external reset.
MC68HC05X16
1 (set)
0 (clear) –
1 (set)
0 (clear) –
Options (OPTR)
The EEPROM1 protect function is disabled while in bootstrap mode.
EEPROM options register (OPTR)
Freescale Semiconductor, Inc.
–
–
(1)
For More Information On This Product,
EEPROM can be accessed for any read, erase or programming
operations.
program a location will be unsuccessful.
Part 2 of the EEPROM array is not protected; all 256 bytes of
Part 2 of the EEPROM array is protected; any attempt to erase or
EEPROM/EPROM not protected.
EEPROM/EPROM protected.
Address
Go to: www.freescale.com
$0100
bit 7
MC68HC705X32
bit 6
bit 5
bit 4
bit 3
bit 2
EE1P
bit 1
SEC Not affected
bit 0
on reset
State
B-11
15