Renesas H8 Series Hardware Manual page 240

Section 8 I/O Ports
Bit 4—P1 / /
4 4
I R Q A D T R G
This bit selects whether pin P1
Bit 4
IRQ4 Description
0 Functions as P1
1 Functions as
Note: For details of
A D T R G
Trigger Input.
Bit 3—P1 /TMIG Pin Function Switch (TMIG)
3
This bit selects whether pin P1
Bit 3
TMIG Description
0 Functions as P1
1 Functions as TMIG input pin
Bits 2 and 0—Reserved
These bits are reserved; they can only be written with 0.
Bit 1—Reserved
This bit is reserved; it is always read as 1 and cannot be modified.
Port Mode Register 2 (PMR2)
Bit 7
—
Initial value 1
Read/Write —
PMR2 is an 8-bit read/write register. It controls whether the PMOS transistor internal to P3
or off, the selection of the watchdog timer clock, the selection of TMIG noise cancellation, and
switching of the P4 /
3
I R Q
Upon reset, PMR2 is initialized to H'D8.
Rev. 7.00 Mar 10, 2005 page 198 of 652
REJ09B0042-0700
Pin Function Switch (IRQ4)
/ /
4 4
I R Q A D T R G
I/O pin
4
/ input pin
4
I R Q A D T R G
pin setting, see section 12.3.2, Start of A/D Conversion by External
/TMIG is used as P1
3
I/O pin
3
6 5
— POF1
1 0
— R/W
pin functions.
0
is used as P1 or as
4
I R Q
or as TMIG.
3
4 3
— —
1 1
— —
/ .
4
A D T R G
(initial value)
(initial value)
2 1
WDCKS NCS
0 0
R/W R/W
0
IRQ0
0
R/W
is on
5