MC68HC711E9FU Freescale Semiconductor, MC68HC711E9FU Datasheet - Page 211

MC68HC711E9FU

Manufacturer Part Number
MC68HC711E9FU
Description
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68HC711E9FU

Cpu Family
HC11
Device Core Size
8b
Frequency (max)
4MHz
Interface Type
SCI/SPI
Program Memory Type
EPROM
Program Memory Size
12KB
Total Internal Ram Size
512Byte
# I/os (max)
38
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
8-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
64
Package Type
PQFP
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC711E9FU
Manufacturer:
MOT
Quantity:
47
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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