MC9S12Q128_10 Datasheet, PDF (82/644 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 2 Port Integration Module (PIM9C32) Block Description
2.3.2.1.4 Port T Reduced Drive Register (RDRT)
Module Base + 0x0003
R
W
Reset
7
RDRT7
0
Read: Anytime.
Write: Anytime.
6
RDRT6
5
RDRT5
4
RDRT4
3
RDRT3
2
RDRT2
0
0
0
0
0
Figure 2-6. Port T Reduced Drive Register (RDRT)
Table 2-6. RDRT Field Descriptions
1
RDRT1
0
0
RDRT0
0
Field
Description
7–0
RDRT[7:0]
Reduced Drive Port T — This register configures the drive strength of each port T output pin as either full or
reduced. If the port is used as input this bit is ignored.
0 Full drive strength at output.
1 Associated pin drives at about 1/3 of the full drive strength.
2.3.2.1.5 Port T Pull Device Enable Register (PERT)
Module Base + 0x0004
R
W
Reset
7
PERT7
0
Read: Anytime.
Write: Anytime.
6
PERT6
5
PERT5
4
PERT4
3
PERT3
2
PERT2
0
0
0
0
0
Figure 2-7. Port T Pull Device Enable Register (PERT)
1
PERT1
0
Table 2-7. PERT Field Descriptions
0
PERT0
0
Field
Description
7–0
PERT[7:0]
Pull Device Enable — This register configures whether a pull-up or a pull-down device is activated, if the port
is used as input. This bit has no effect if the port is used as output. Out of reset no pull device is enabled.
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
82
MC9S12Q128
Freescale Semiconductor
Rev 1.10