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CHAPTER 7 HARDWARE SPECIFICATIONS
User's Manual U13502EJ2V0UM00
81
7.4.1 Interface Specifications
Use the target interface connector to interface with the target.
Bear in mind the following points when connecting the target and designing the target board.
•
Supply voltage and operating clock of target
Basically, supply the power and operating clock to the microcontroller from the target board when programming
its flash memory. Power can be also supplied from the PG-FP3, but
a current high enough to operate the
entire target cannot be supplied
. In addition, the frequency of the clock that can be supplied from the PG-FP3
is limited to 16, 8, 4, and 2 MHz.
When supplying power and a clock from the PG-FP3, use a dedicated writing adapter such as the FA adapter
Note
.
The level of each interface signal is converted in the PG-FP3 at the operating voltage (V
DD
). Therefore, even
when the power supply (V
DD
) on the user target is used, connect the V
DD
line to the target. With a device using
two supply voltages and requiring interface signals of different levels, output either of the voltage levels from the
PG-FP3, and convert the level of the signal with the different signal level on the target.
•
Signal conflict
If an output from another device is connected to the serial interface pin and reset pin, a signal conflict or
malfunction may occur. If this occurs, either isolate the connection with the other device, or make the output
from the other device high impedance. Exercise care so that the target is not inadvertently reset during
programming.
•
Connection of serial port
When programming flash memory using a UART or SIO, match the input/output of the SI and SO signals when
connecting the SI (RxD) and SO (TxD) signals of the PG-FP3 to the SI (RxD) and SO (TxD) of the target.
PG-FP3 side Microcontroller side
SI (RxD)
SO (TxD)
← →
← →
SO (TxD)
SI (RxD)
When interfacing with IIC, the SI pin of the PG-FP3 serves as a SD (serial data) line. Therefore, connect the
SCK and SI pin.
Note
The FA adapter is a product of Naito Densei Machida Mfg. Co., Ltd.