Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 257
4.3.2.69 Port AD1 Data Direction Register 1 (DDR1AD1)
Read: Anytime.
Write: Anytime.

This register configures pins PAD[15:08] as either input or output.

0x027B
76543210
R
DDR1AD115 DDR1AD114 DDR1AD113 DDR1AD112 DDR1AD111 DDR1AD110 DDR1AD19 DDR1AD18
W
Reset 00000000

Figure 4-71. Port AD1 Data Direction Register 1 (DDR1AD1)

Table 4-62. DDR1AD1 Field Descriptions

Field Description
7–0
DDR1AD1[15:8]
Data Direction Port AD1 Register 1
0 Associated pin is configured as input.
1 Associated pin is configured as output.
Note: Due to internal synchronization circuits, it can take up to 2 bus clock cycles until the correct value is
read on PTAD11 register, when changing the DDR1AD1 register.
Note: To use the digital input function on port AD1 the ATD1 digital input enable register (ATD1DIEN1) has
to be set to logic level “1”.