MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 93

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 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

4.5.1 Programming an Individual EPROM Address
M68HC11E Family — Rev. 3.2
MOTOROLA
NOTE:
As described in the following subsections, these two methods of
programming and verifying EPROM are possible:
In this method, the MCU programs its own EPROM by controlling the
PPROG register (EPROG in MC68HC711E20). Use these procedures
to program the EPROM through the MCU with:
Any operating mode can be used.
This example applies to all devices with EPROM/OTPROM except for
the MC68HC711E20.
This example applies only to MC68HC711E20.
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EPROG
EPROG
Programming an individual EPROM address
Programming the EPROM with downloaded data
The ROMON bit set in the CONFIG register
The 12-volt nominal programming voltage present on the
XIRQ/V
The IRQ pin must be pulled high.
Operating Modes and On-Chip Memory
LDAB
STAB
STAA
LDAB
STAB
JSR
CLR
LDAB
STAB
STAA
LDAB
STAB
JSR
CLR
PPE
pin
#$20
$103B
$0,X
#$21
$103B
DLYEP
$103B
#$20
$1036
$0,X
#$21
$1036
DLYEP
$1036
Set ELAT bit in (EPGM = 0) to enable
EPROM latches.
Store data to EPROM address
Set EPGM bit with ELAT = 1 to enable
EPROM programming voltage
Delay 2–4 ms
Turn off programming voltage and set
to READ mode
Set ELAT bit (EPGM = 0) to enable
EPROM latches.
Store data to EPROM address
Set EPGM bit with ELAT = 1 to enable
EPROM programming voltage
Delay 2–4 ms
Turn off programming voltage and set
to READ mode
Operating Modes and On-Chip Memory
EPROM/OTPROM
Technical Data
93