mpc82g516a Megawin Technology, mpc82g516a Datasheet - Page 106

• Manufacturer Part Number: mpc82g516a
• Description: 8-bit Microcontroller
• Manufacturer: Megawin Technology

20.2.5.2 ISP through COM Port
Features
This ISP mechanism connects the target MCU to the PC through the COM port, which needs no additional
hardware except an RS232 transceiver chip (such as the MAX232 chip).
The following system diagram shows the connection between the target MCU and the PC. Where, P3.0 and P3.1
function as the UART’s RXD and TXD, respectively; and they are connected to the PC’s COM port through the
MAX232 chip.
It is not recommended to adopt this mechanism for ISP because the modern computer, especially a notebook
computer, is not equipped with a COM port gradually.
Figure 20-9. System Diagram for ISP via COM Port
MEGAWIN
The ‘ISP code’ for this mechanism is provided by Megawin.
Auto baudrate detection & operation independent of the oscillator frequency.
No additional hardware except an RS232 transceiver.
Target System
MPC82G516A
With
Megawin
-provided
'ISP code'
preprogrammed
in the
ISP-memory
P3.1
P3.0
TXD
RXD
RS232 Transceiver
(such as MAX232)
T_IN
R_OUT
MPC82G516A Data Sheet
T_OUT
R_IN
RS232
Connector
5
4
3
2
1
9
8
7
6
RS232 Cable
COM Port
PC
106