MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 71

• Manufacturer Part Number: MC68HC711P2CFN4
• Description: IC MCU 32K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711P2CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.6.4 RAM and EEPROM security
MC68HC11P2 — Rev 1.0
Configuration control (CONFIG) $003F
The optional security feature protects the contents of EEPROM and
RAM from unauthorized access. A program, or a key portion of a
program, can be protected against duplication. To accomplish this, the
protection mechanism restricts operation of protected devices to single
chip modes, and thus prevents the memory locations from being
monitored externally (single chip modes do not allow visibility of the
internal address and data buses). Resident programs, however, have
unlimited access to the internal EEPROM and RAM and can read, write,
or transfer the contents of these memories. The NOSEC bit in the
CONFIG register disables this feature on devices that incorporate it.
Contact a Motorola representative for information on the availability of
this feature.
If the security feature is present and enabled and bootstrap mode is
selected, then the following sequence is performed by the bootstrap
program:
If all the above operations are successful, the bootloading process
continues as if the device has not been secured.
CONFIG — System configuration register
For a description of the other bits contained in the CONFIG register refer
1. Output $FF on the SCI.
2. Turn block protect off. Clear BPROT register.
3. IF EEPROM is enabled, erase it all.
4. Verify that the EEPROM is erased; if not, begin sequence again.
5. Write $FF to every RAM byte.
6. Erase the CONFIG register.
Freescale Semiconductor, Inc.
Address bit 7
For More Information On This Product,
Operating Modes and On-Chip Memory
ROMA
Go to: www.freescale.com
D
bit 6
1
bit 5
1
PAREN
bit 4
EPROM, EEPROM and CONFIG register
NOSE
Operating Modes and On-Chip Memory
bit 3
C
NOCO
bit 2
P
ROMO
bit 1
N
EEON x11x 1xxx
bit 0
Technical Data
on reset
State