HD64F3437TF16 Datasheet, PDF (718/752 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
Q
R
D
P4_nDDR
C
WP4D
HIF
Reset
Reset
RESOBF2,
RESOBF1
P4_n
R
QD
P4_nDR
C
(reset HIRQ₁₁
and HIRQ₁₂,
respectively)
WP4
RP4
WP4D: Write to P4DDR
WP4: Write to port 4*
RP4: Read port 4
n = 3, 5
8-bit timer
Counter clock input
Counter reset input
Note: * Refer to table 14.9.
Figure C.4 (c) Port 4 Block Diagram (Pins P4₃, P4₅)
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