MC68HC711E9CFN2 Freescale Semiconductor, MC68HC711E9CFN2 Datasheet - Page 104

• Manufacturer Part Number: MC68HC711E9CFN2
• Description: IC MCU 12K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E9CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 512 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: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Operating Modes and On-Chip Memory
4.6.1.5 EEPROM Byte Erase
4.6.1.6 CONFIG Register Programming
4.6.2 EEPROM Security
Technical Data
104
NOTE:
This is an example of how to erase a single byte of EEPROM.
Because the CONFIG register is implemented with EEPROM cells, use
EEPROM procedures to erase and program this register. The procedure
for programming is the same as for programming a byte in the EEPROM
array, except that the CONFIG register address is used. CONFIG can be
programmed or erased (including byte erase) while the MCU is
operating in any mode, provided that PTCON in BPROT is clear.
To change the value in the CONFIG register, complete this procedure.
Do not initiate a reset until the procedure is complete.
The optional security feature, available only on ROM-based MCUs,
protects the EEPROM and RAM contents from unauthorized access. A
program, or a key portion of a program, can be protected against
unauthorized duplication. To accomplish this, the protection mechanism
restricts operation of protected devices to the single-chip modes. This
1. Erase the CONFIG register.
2. Program the new value to the CONFIG address.
3. Initiate reset.
BYTEE
Operating Modes and On-Chip Memory
LDAB
STAB
STAB
LDAB
STAB
JSR
CLR
#$16
$103B
0,X
#$17
$103B
DLY10
$103B
BYTE = 1, ERASE = 1, EELAT = 1
Set to BYTE erase mode
Write any data to address to be erased
BYTE = 1, ERASE = 1, EELAT = 1,
EPGM = 1
Turn on high voltage
Delay 10 ms
Turn off high voltage and set
to READ mode
M68HC11E Family — Rev. 3.2
MOTOROLA