mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 88

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1
1
1
Port Integration Module (S12XSPIMV1)
2.3.22
2.3.23
88
Address 0x0244
Address 0x0245
Read: Anytime.
Write: Anytime.
Read: Anytime.
Write: Anytime.
Read: Anytime.
Write: Anytime.
RDRT
PERT
Field
Field
Reset
Reset
7-0
7-0
W
W
R
R
Port T reduced drive—Select reduced drive for output pin
This bit configures the drive strength of the associated output pin as either full or reduced. If a pin is used as input
this bit has no effect. The reduced drive function is independent of which function is being used on a particular pin.
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
Port T pull device enable—Enable pull device on input pin
This bit controls whether a pull device on the associated port input pin is active. If a pin is used as output this bit has
no effect. The polarity is selected by the related polarity select register bit.
1 Pull device enabled
0 Pull device disabled
PERT7
PPST7
Port T Pull Device Enable Register (PERT)
Port T Polarity Select Register (PPST)
0
0
7
7
PERT6
PPST6
Figure 2-20. Port T Pull Device Enable Register (PERT)
0
0
6
6
Figure 2-21. Port T Polarity Select Register (PPST)
Table 2-19. RDRT Register Field Descriptions
Table 2-20. PERT Register Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
PERT5
PPST5
0
0
5
5
PERT4
PPST4
0
0
4
4
Description
Description
PERT3
PPST3
3
0
3
0
PERT2
PPST2
0
0
2
2
Freescale Semiconductor
PERT1
PPST1
Access: User read/write
Access: User read/write
0
0
1
1
PERT0
PPST0
0
0
0
0
1
1