Datasheet

Chapter 3 Port Integration Module (PIM9E128V1)
MC9S12E128 Data Sheet, Rev. 1.07
130 Freescale Semiconductor
3.3.1.2 Port AD Input Register (PTIAD)
Read: Anytime. Write: Never; writes to these registers have no effect.
If the ATDDIEN0(1) bit of the associated I/O pin is set to 0 (digital input buffer is disabled), a read returns
a 1. If the ATDDIEN0(1) bit of the associated I/O pin is set to 1 (digital input buffer is enabled), a read
returns the status of the associated pin.
76543210
R PTIAD15 PTIAD14 PTIAD13 PTIAD12 PTIAD11 PTIAD10 PTIAD9 PTIAD8
W
Reset 1 1 1 11111
76543210
R PTIAD7 PTIAD6 PTIAD5 PTIAD4 PTIAD3 PTIAD2 PTIAD1 PTIAD0
W
Reset 1 1 1 11111
= Reserved or Unimplemented
Figure 3-3. Port AD Input Register (PTIAD)