HD64F3437TF16 Datasheet, PDF (676/752 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.

TCNT—Timer Counter
H'A9 (read),
H'A8 (write)
WDT
Bit
7
6
5
4
3
2
1
0
Initial value
Read/Write
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Count value
P1PCR—Port 1 Input Pull-Up Control Register
H'AC
Port 1
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
P1₇PCR P1₆PCR P1₅PCR P1₄PCR P1₃PCR P1₂PCR P1₁PCR P1₀PCR
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Port 1 Input Pull-Up Control
0 Input pull-up transistor is off.
1 Input pull-up transistor is on.
P2PCR—Port 2 Input Pull-Up Control Register
H'AD
Port 2
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
P2₇PCR P2₆PCR P2₅PCR P2₄PCR P2₃PCR P2₂PCR P2₁PCR P2₀PCR
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Port 2 Input Pull-Up Control
0 Input pull-up transistor is off.
1 Input pull-up transistor is on.
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