Renesas H8/38024 Hardware Manual page 222

IRQ ADTRG Pin Function Switch (IRQ4)
IRQ IRQ ADTRG ADTRG
Bit 4—P1 /IRQ /ADTRG
4 4
This bit selects whether pin P1
Bit 4
IRQ4 Description
0 Functions as P1
Functions as IRQ
1
Note: For details of ADTRG pin setting, see section 12.3.2, Start of A/D Conversion by External
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 /IRQ
3
Upon reset, PMR2 is initialized to H'D8.
This section only deals with the bits related to timer G and the watchdog timer. For the functions
of the bits, see the descriptions of port 3 (POF1) and port 4 (IRQ0).
Rev. 6.00, 08/04, page 192 of 628
/IRQ /ADTRG is used as P1
4 4
I/O pin
4
/ADTRG input pin
4
/TMIG is used as P1
3
I/O pin
3
6 5
— POF1
1 0
— R/W
pin functions.
0
or as IRQ
4 4
or as TMIG.
3
4 3
— — WDCKS
1 1
— — R/W
/ADTRG.
(initial value)
(initial value)
2 1
NCS IRQ0
0 0
R/W R/W
is on
5
0
0