PG-FP4-E Renesas Electronics America, PG-FP4-E Datasheet - Page 96

• Manufacturer Part Number: PG-FP4-E
• Description: PROGRAMMER FLASH MEMORY UNIV
• Manufacturer: Renesas Electronics America

Specifications of PG-FP4-E

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

using the PG-FP4.
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This chapter explains the basic notes on the target system for rewriting the flash memory in the microcontroller
CPU Pin
RESET
Do not connect the RESET signal generator on the target system to the RESET signal of the PG-FP4.
Otherwise, a signal conflict will occur. To avoid the conflict, isolate the RESET signal generator from the RESET
signal of the PG-FP4.
Do not generate RESET while the PG-FP4 is connected. This must be especially noted in a system that uses
an external watchdog timer.
Connect the RESET signal of the PG-FP4 at a point where the status of the programmer RESET signal and that
of the CPU RESET pin are the same.
Correct connection:
Avoid the following RESET signal connection.
• Connection to a point where the target CPU RESET rise time is slower than the PG-FP4 RESET rise time.
Incorrect connection:
It takes time for the CPU RESET pin to go high after the PG-FP4 RESET level goes from low to high.
CHAPTER 8 NOTES ON TARGET SYSTEMS
User’s Manual U15260EJ4V0UM
PG-FP4 RESET
PG-FP4 RESET
Design Proposal
OC
CPU
CPU
RESET
RESET