Pin States - Hitachi HD6473867 Hardware Manual

Table 8-9 Port 4 Pin Functions
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
0
CKE1
CKE0
COM32
PCR4
0
Pin function P4
0
Sleep Subsleep
Retains Retains
previous previous
state state
in PCR4.
0
0
0
0 1
input pin P4 output pin
0
Standby
High-
impedance
150
1
1 *
*
SCK
32
output pin
Watch Subactive
Retains Functional
previous
state
1
*
*
*
SCK
32
input pin
Active
Functional