Datasheet

Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.21
844 Freescale Semiconductor
22.3.2.24 Port S Input Register (PTIS)
Read: Anytime.
Write: Never, writes to this register have no effect.
This register always reads back the buffered state of the associated pins. This also can be used to detect
overload or short circuit conditions on output pins.
76543210
R PTIS7 PTIS6 PTIS5 PTIS4 PTIS3 PTIS2 PTIS1 PTIS0
W
Reset
1
1
These registers are reset to zero. Two bus clock cycles after reset release the register values are updated with the associated
pin values.
————————
= Unimplemented or Reserved
Figure 22-26. Port S Input Register (PTIS)