HD64F3437TF16 Datasheet, PDF (732/752 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.

HIE
STAC
Reset
R
QD
P8₅DDR
C
WP8D
SCI
Input enable
Reset
R
P8₅
QD
P8₅DR
C
WP8
RP8
Serial receive
data
HIF
CS₂ input
IRQ₄ input
IRQ enable register
WP8D: Write to P9DDR
WP8: Write to port 8
RP8: Read port 8
IRQ₄ enable
Figure C.8 (e) Port 8 Block Diagram (Pin P8₅)
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