mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 110

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

1
1
Port Integration Module (S12XSPIMV1)
2.3.53
2.3.54
110
Address 0x0263
Address 0x0264
Read: Anytime.
Write: Anytime.
Read: Anytime.
Write: Anytime.
RDRH
PERH
Field
Field
Reset
Reset
7-0
7-0
W
W
R
R
Port H 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 H 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
RDRH7
PERH7
Port H Reduced Drive Register (RDRH)
Port H Pull Device Enable Register (PERH)
0
0
7
7
RDRH6
PERH6
Figure 2-52. Port H Pull Device Enable Register (PERH)
0
0
6
6
Figure 2-51. Port H Reduced Drive Register (RDRH)
Table 2-50. RDRH Register Field Descriptions
Table 2-51. PERH Register Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
RDRH5
PERH5
0
0
5
5
RDRH4
PERH4
0
0
4
4
Description
Description
RDRH3
PERH3
3
0
3
0
RDRH2
PERH2
0
0
2
2
Freescale Semiconductor
RDRH1
PERH1
Access: User read/write
Access: User read/write
0
0
1
1
RDRH0
PERH0
0
0
0
0
1
1