Common notes
Philips P89LPC9xx microcontrollers
Following signals are use for In-system programming of
P87LPC76x microcontrollers.
RST\ reset / switch to programming mode
P0.5 clock
P0.4 data input / output
VDD power supply
VSS ground
P0.4 and P0.5 signals are used by the P89LPC9xxx for In-
system programming, therefore target system mustn’t affect
these signals during In-system programming to avoid
programming errors.
ELNEC’s recommended circuit for P89LPC9xx:
R1 10k
R2 10k
G
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