XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 150
XC68HC08KH12
Manufacturer Part Number
XC68HC08KH12
Description
MICROCONTROLLER
Manufacturer
Motorola
Datasheet
1.XC68HC08KH12.pdf
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Monitor ROM (MON)
10.3 Features
10.4 Functional Description
Advance Information
150
Features of the monitor ROM include the following:
The monitor ROM receives and executes commands from a host
computer.
mode and communicate with a host computer via a standard RS-232
interface.
Simple monitor commands can access any memory address. In monitor
mode, the MCU can execute host-computer code in RAM while all MCU
pins retain normal operating mode functions. All communication
between the host computer and the MCU is through the PTA0 pin. A
level-shifting and multiplexing interface is required between PTA0 and
the host computer. PTA0 is used in a wired-OR configuration and
requires a pull-up resistor.
•
•
•
•
•
•
Normal User-Mode Pin Functionality
One Pin Dedicated to Serial Communication between Monitor
ROM and Host Computer
Standard Mark/Space Non-Return-to-Zero (NRZ) Communication
with Host Computer
4800 Baud to 28.8 kBaud Communication with Host Computer
Execution of Code in RAM or ROM
OTPROM Programming
Figure 10-1
Monitor ROM (MON)
shows a sample circuit used to enter monitor
MC68HC(7)08KH12
MOTOROLA
—
Rev. 1.0
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