Datasheet

Port Integration Module (S12XSPIMV1)
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor 75
2.3.3 Port A Data Register (PORTA)
2.3.4 Port B Data Register (PORTB)
Address 0x0000 (PRR) Access: User read/write
1
1
Read: Anytime, the data source depends on the data direction value
Write: Anytime
76543210
R
PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0
W
Reset 00000000
Figure 2-1. Port A Data Register (PORTA)
Table 2-4. PORTA Register Field Descriptions
Field Description
7-0
PA
Port A general purpose input/output data—Data Register
The associated pin can be used as general purpose I/O. In general purpose output mode the register bit value is
driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.
Address 0x0001 (PRR) Access: User read/write
1
1
Read: Anytime, the data source depends on the data direction value
Write: Anytime
76543210
R
PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0
W
Reset 00000000
Figure 2-2. Port B Data Register (PORTB)
Table 2-5. PORTB Register Field Descriptions
Field Description
7-0
PB
Port B general purpose input/output data—Data Register
The associated pin can be used as general purpose I/O. In general purpose output mode the register bit value is
driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.