HD64F3437TF16 Datasheet, PDF (734/752 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.

C.9 Port 9 Block Diagrams
HIE
STAC
P9₀
Reset
R
QD
P9₀DDR
C
WP9D
Reset
R
QD
P9₀DR
C
WP9
RP9
HIF
ECS₂ input
IRQ₂ input
IRQ enable register
IRQ₂ enable
WP9D: Write to P9DDR
WP9: Write to port 9
RP9: Read port 9
A/D converter
External trigger
input
Figure C.9 (a) Port 9 Block Diagram (Pin P9₀)
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