MC68HC11E0CFNE2R Freescale Semiconductor, MC68HC11E0CFNE2R Datasheet - Page 211

IC MCU 8BIT 2MHZ 52-PLCC

MC68HC11E0CFNE2R

Manufacturer Part Number
MC68HC11E0CFNE2R
Description
IC MCU 8BIT 2MHZ 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC11r
Datasheet

Specifications of MC68HC11E0CFNE2R

Core Processor
HC11
Core Size
8-Bit
Speed
2MHz
Connectivity
SCI, SPI
Peripherals
POR, WDT
Number Of I /o
38
Program Memory Type
ROMless
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
Processor Series
HC11E
Core
HC11
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SCI, SPI
Maximum Clock Frequency
2 MHz
Number Of Programmable I/os
38
Number Of Timers
8
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC11E0CFNE2R
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Driving Boot Mode from a Personal Computer
In this example, a personal computer is used as the host to drive the bootloader of an MC68HC711E9.
An M68HC11 EVBU is used for the target MC68HC711E9. A large program is transferred from the
personal computer into the EPROM of the target MC68HC711E9.
Hardware
Figure 7
programming voltage. The XIRQ pin is connected to a pullup resistor, two jumpers, and the 60-pin
connectors, P4 and P5. The object of the modification is to isolate the XIRQ pin and then connect it to the
programming power supply. Carefully cut the trace on the solder side of the EVBU as indicated in
7. This disconnects the pullup resistor RN1 D from XIRQ but leaves P4–18, P5–18, and jumpers J7 and
J14 connected so the EVBU can still be used for other purposes after programming is done. Remove any
fabricated jumpers from J7 and J14. The EVBU normally has a jumper at J7 to support the trace function
Figure 8
allows the XIRQ line to be connected to either the programming power supply or to a substitute pullup
resistor for XIRQ. The 100-ohm resistor is a current limiter to protect the 12-volt input of the MCU. The
resistor and LED connected to P5 pin 9 (port C bit 0) is an optional indicator that lights when programming
is complete.
Software
BASIC was chosen as the programming language due to its readability and availability in parallel versions
on both the IBM
for use with an M68HC11 and is not necessarily intended to be a finished, commercial program. For
example, there is little error checking, and the user interface is elementary. A complete listing of the
BASIC program is included in
The following paragraphs include a more detailed discussion of the program as it pertains to
communicating with and programming the target MC68HC711E9. Lines 25–45 initialize and define the
variables and array used in the program. Changes to this section would allow for other programs to be
downloaded.
®
®
Freescale Semiconductor
Macintosh is a registered trademark of Apple Computers, Inc.
IBM is a registered trademark of International Business Machines.
Last Program Address: $B67C
Last Storage Address: $0000
shows a small modification to the EVBU to accommodate the 12-volt (nominal) EPROM
shows a small circuit that is added to the wire-wrap area of the EVBU. The 3-terminal jumper
Program Bytes: $007D
Storage Bytes: $0000
®
PC and the Macintosh
Errors: None
Labels: 28
Listing 2. BASIC Program for Personal Computer
M68HC11 Bootstrap Mode, Rev. 1.1
®
. The program demonstrates several programming techniques
125
0
Driving Boot Mode from a Personal Computer
with moderate comments.
Figure
211

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