Datasheet

Port Integration Module (S12XSPIMV1)
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor 79
2.3.10 Ports ABEK, BKGD pin Pull-up Control Register (PUCR)
Table 2-9. DDRE Register Field Descriptions
Field Description
7-2
DDRE
Port E Data Direction—
This bit determines whether the associated pin is an input or output.
1 Associated pin configured as output
0 Associated pin configured as input
Address 0x000C (PRR) Access: User read/write
1
1
Read: Anytime in single-chip modes
Write: Anytime, except BKPUE which is writable in Special Single-Chip Mode only
76543210
R
PUPKE BKPUE
0
PUPEE
00
PUPBE PUPAE
W
Reset 11010000
= Unimplemented or Reserved
Figure 2-8. Ports ABEK, BKGD pin Pull-up Control Register (PUCR)
Table 2-10. PUCR Register Field Descriptions
Field Description
7
PUPKE
Port K Pull-up Enable—Enable pull-up devices on all port input pins
This bit configures whether a pull-up device is activated on all associated port input pins. If a pin is used as output
this bit has no effect.
1 Pull-up device enabled
0 Pull-up device disabled
6
BKPUE
BKGD pin pull-up Enable—Enable pull-up device on pin
This bit configures whether a pull-up device is activated, if the pin is used as input. If a pin is used as output this bit
has no effect.
1 Pull-up device enabled
0 Pull-up device disabled
4
PUPEE
Port E Pull-up Enable—Enable pull-up devices on all port input pins except pins 5 and 6
This bit configures whether a pull-up device is activated on all associated port input pins. If a pin is used as output
this bit has no effect.
Pins 5 and 6 have pull-down devices enabled only during reset. This bit has no effect on these pins.
1 Pull-up device enabled
0 Pull-up device disabled