S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 2 Port Integration Module (S12XEP100PIMV1)
2.3.33
Port S Pull Device Enable Register (PERS)
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
Access: User read/write
(1)
6
5
4
3
2
1
0
Address 0x024C
7
R
PERS7
W
Reset
1
1
1
1
1
1
1
1
PERS6
PERS5
PERS4
PERS3
PERS2
PERS1
PERS0
Figure 2-31. Port S Pull Device Enable Register (PERS)
1. Read: Anytime.
Write: Anytime.
Table 2-30. PERS Register Field Descriptions
Field
7-0
PERS
Description
Port S pull device enable—Enable
pull devices on input pins
These bits configure whether a pull device is activated, if the associated pin is used as an input. This bit has no effect
if the pin is used as an output. Out of reset all pull devices are enabled.
1 Pull device enabled.
0 Pull device disabled.
2.3.34
Port S Polarity Select Register (PPSS)
Access: User read/write
(1)
6
5
4
3
2
1
0
Address 0x024D
7
R
PPSS7
W
Reset
0
0
0
0
0
0
0
0
PPSS6
PPSS5
PPSS4
PPSS3
PPSS2
PPSS1
PPSS0
Figure 2-32. Port S Polarity Select Register (PPSS)
1. Read: Anytime.
Write: Anytime.
Table 2-31. PPSS Register Field Descriptions
Field
7-0
PPSS
Description
Port S pull device select—Determine
pull device polarity on input pins
This register selects whether a pull-down or a pull-up device is connected to the pin.
1 A pull-down device is connected to the associated pin, if enabled and if the pin is used as input.
0 A pull-up device is connected to the associated pin, if enabled and if the pin is used as input.
MC9S12XE-Family Reference Manual , Rev. 1.19
128
Freescale Semiconductor
