NEC PG-FP4, Руководство пользователя

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CHAPTER 8 NOTES ON TARGET SYSTEMS
User’s Manual U15260EJ3V1UM
99
CPU Pin Design Proposal
V
PP
Keep the wiring between the PG-FP4 connector and the CPU V
PP
pin as thick and as short as possible.
Insert neither capacitors nor resistors into the V
PP
line unless otherwise stated.
Note that when pull-down resistors are needed due to the specifications of the target, the resistor value must be
470
Ω
or higher.
Incorrect circuit:
CPU
CPU
V
PP
PG-FP4 V
PP
PG-FP4 V
PP
V
PP
Others For the unused pins, refer to the user’s manual of the device.
Some devices have pins that must be processed differently. For these pins also, refer to the user’s manual of
the device.
Example of pins processed differently:
MODE
CKSEL
REGOUT
REGIN, etc.