HD6473887 Datasheet, PDF (171/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Table 8-12 Port 4 Pin Functions (cont)
Pin
P4₀/SCK₃₂
Pin Functions and Selection Method
The pin function depends on bits CKE1 and CKE0 in SCR3-2, bit COM32 in
SMR32, and bit PCR4₀ in PCR4.
CKE1
0
1
CKE0
0
1
*
COM32
0
1
*
*
PCR4₀
Pin function
0
P4₀ input pin
1
P4₀ output pin
*
SCK₃₂
output pin
*
SCK₃₂
input pin
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
impedance previous
state
Subsleep
Retains
previous
state
Standby
High-
impedance
Watch
Retains
previous
state
Subactive Active
Functional Functional
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