20.2.5 ISP Tools Provided by Megawin
Although the user may design his own ISP, Megawin provides two types of ISP tool for the user; one is the ISP
Programmer, which connects the target MCU to the PC through the USB port; and the other through the COM
port, which needs no additional hardware except an RS232 transceiver. This section shows a brief description for
these tools. The user may contact Megawin for further detailed information.
20.2.5.1 The “Megawin 8051 ISP Programmer”
Features
The standard ‘ISP code’ is pre-programmed in factory before shipping.
Only one port pin (P3.1) used for the ISP interface.
Operation independent of the oscillator frequency.
Capable of stand-alone working without host’s intervention.
The above valuable features make the ISP Programmer very friendly to the user. Particularly, it is capable of
stand-alone working after the programming data is downloaded. This is especially useful in the field without a PC.
The picture and system diagram of the “Megawin 8051 ISP Programmer” are shown below. Only three pins are
used for the ISP interface: the DTA line transmits the programming data from the ISP Programmer to the target
MCU; the VCC & GND are the power supply entry of the ISP Programmer. The USB connector can be directly
plugged into the PC’s USB port to download the programming data from PC to the ISP Programmer.
Figure 20-7. Picture of the “8051 ISP Programmer”
Figure 20-8. System Diagram for the ISP Function
Target System
PC
ISP
Interface
"Megawin 8051 ISP Programmer"
MPC82G516A
MEGAWIN
USB
VDD
DTA
GND
VCC
SDA
GND
MAKE YOU WIN
(less than 30cm)
VDD
P3.1
VSS
ISP Programmer
With
standard
'ISP code'
preprogrammed
in the
ISP-memory
105
MPC82G516A Data Sheet
MEGAWIN
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
