Datasheet

Table Of Contents
Section 9 I/O Ports
REJ09B0140-0900 Rev. 9.00 Page 243 of 846
Sep 16, 2010
H8S/2215 Group
9.3 Port 4
Port 4 is a 4-bit I/O port also functioning as A/D converter analog input. Port 4 has the following
register.
Port 4 register (PORT4)
9.3.1 Port 4 Register (PORT4)
PORT4 shows port 4 pin states. PORT4 cannot be modified.
Bit Bit
Name
Initial Value R/W Description
7 to
4
— Undefined — Reserved
These bits are undefined.
3 P43
*
R
2 P41
*
R
1 P41
*
R
The pin states are always read when a port 4 read is
performed.
0 P40
*
R
Note: * Determined by the states of pins P43 to P40.
9.3.2 Pin Function
Port 4 also functions as A/D converter analog input (AN3 to AN0).