MC9S12HY64 Datasheet, PDF (108/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12HYPIMV1)
2.3.58 Port R Input Register (PTIR)
Address 0x0281
7
R PTIR7
6
PTIR6
5
PTIR5
4
PTIR4
3
PTIR3
2
PTIR2
W
Reset
u
u
u
u
u
u
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-56. Port R Input Register (PTIR)
1 _{Read: Anytime.}
Write:Never, writes to this register have no effect.
Access: User read¹
1
PTIR1
0
PTIR0
u
u
Field
7-0
PTIR
Table 2-48. PTIR Register Field Descriptions
Description
Port R input data—
This register always reads back the buffered state of the associated pins. This can also be used to detect overload
or short circuit conditions on output pins.
2.3.59 Port R Data Direction Register (DDRR)
Address 0x0282
R
W
Reset
7
DDRR7
0
1 _{Read: Anytime.}
Write: Anytime.
6
DDRR6
5
DDRR5
4
DDRR4
3
DDRR3
2
DDRR2
0
0
0
0
0
Figure 2-57. Port R Data Direction Register (DDRR)
Access: User read/write¹
1
0
DDRR1
DDRR0
0
0
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
108
Freescale Semiconductor