HD64F3437TF16 Datasheet, PDF (729/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

Reset
R
QD
P8₁DDR
C
WP8D
Reset
R
P8₁
QD
P8₁DR
C
WP8
HIF
FGA₂₀E
FGA₂₀
RP8
WP8D: Write to P8DDR
WP8: Write to port 8
RP8: Read port 8
Figure C.8 (b) Port 8 Block Diagram (Pin P8₁)
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