Hitachi H8/3827R Series Hardware Manual page 159

Table 8.9 Port 4 Pin Functions (cont)
Pin Pin Functions and Selection Method
P4 /SCK The pin function depends on bit CKE1 and CKE0 in SCR3-2, bit COM32 in
0 32
SMR32, and bit PCR4
8.4.4 Pin States
Table 8.10 shows the port 4 pin states in each operating mode.
Table 8.10 Port 4 Pin States
Pins Reset
P4 /IRQ High-
3 0
P4 /TXD impedance
2 32
P4 /RXD
1 32
P4 /SCK
0 32
152
in PCR4.
0
CKE1
CKE0
COM32
PCR4
0
Pin function P4
0
Sleep Subsleep Standby
Retains Retains
previous previous
state state
0
0
0
0 1
input pin P4 output pin SCK
0
High-
impedance
1
1
*
*
output SCK
32
pin
Watch Subactive Active
Retains Functional Functional
previous
state
1
*
*
*
input
32
pin