HD6433937 Datasheet, PDF (169/521 Pages) Hitachi Semiconductor – Hardware Manual

8.5.4 Pin States
Table 8-13 shows the port 4 pin states in each operating mode.
Table 8-13 Port 4 Pin States
Pins
P4₃/IRQ₀
P4₂/TXD₃₂
P4₁/RXD₃₂
P4₀/SCK₃₂
Reset
Sleep
High
Retains
previous
state
High -
impedance
Subsleep
Retains
previous
state
Standby
Retains
previous
state
High-
impedance
Watch
Retains
previous
state
Subactive Active
Functional Functional
157