Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
256 Freescale Semiconductor
4.3.2.68 Port AD1 Data Direction Register 0 (DDR0AD1)
Read: Anytime.
Write: Anytime.

This register configures pin PAD[23:16] as either input or output.

0x027A
76543210
R
DDR0AD123 DDR0AD122 DDR0AD121 DDR0AD120 DDR0AD119 DDR0AD118 DDR0AD117 DDR0AD116
W
Reset 00000000

Figure 4-70. Port AD1 Data Direction Register 0 (DDR0AD1)

Table 4-61. DDR0AD1 Field Descriptions

Field Description
7–0
DDR0AD1[23:16]
Data Direction Port AD1 Register 0
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 PTAD10 register, when changing the DDR0AD1 register.
Note: To use the digital input function on Port AD1 the ATD1 digital input enable register (ATD1DIEN0) has
to be set to logic level “1”.