MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 92

• 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

Operating Modes and On-Chip Memory
4.5 EPROM/OTPROM
Technical Data
92
CME — Clock Monitor Enable Bit
Bit 2 — Not implemented
CR[1:0] — COP Timer Rate Select Bits
Certain devices in the M68HC11 E series include on-chip
EPROM/OTPROM. For instance:
Standard MC68HC71E9 and MC68HC711E20 devices are shipped with
the EPROM/OTPROM contents erased (all 1s). The programming
operation programs 0s. Windowed devices must be erased using a
suitable ultraviolet light source before reprogramming. Depending on the
light source, erasing can take from 15 to 45 minutes.
Using the on-chip EPROM/OTPROM programming feature requires an
external 12-volt nominal power supply (V
accomplished using the EPROM/OTPROM programming register
(PPROG).
PPROG is the combined EPROM/OTPROM and EEPROM
programming register on all devices with EPROM/OTPROM except the
MC68HC711E20. For the MC68HC711E20, there is a separate register
for EPROM/OTPROM programming called the EPROG register.
Refer to
Always reads 0
The internal E clock is divided by 2
watchdog system. These control bits determine a scaling factor for
the watchdog timer. Refer to
•
•
•
The MC68HC711E9 devices contain 12 Kbytes of on-chip
EPROM (OTPROM in non-windowed package).
The MC68HC711E20 has 20 Kbytes of EPROM (OTPROM in
non-windowed package).
The MC68HC711E32 has 32 Kbytes of EPROM (OTPROM in
non-windowed package).
Operating Modes and On-Chip Memory
Section 5. Resets and
Section 5. Resets and
Interrupts.
15
before it enters the COP
PPE
). Normal programming is
M68HC11E Family — Rev. 3.2
Interrupts.
MOTOROLA