LFDAS12XSDT Freescale Semiconductor, LFDAS12XSDT Datasheet - Page 79

• Manufacturer Part Number: LFDAS12XSDT
• Description: HARDWARE MC9S12XS 52-PIN
• Manufacturer: Freescale Semiconductor

Specifications of LFDAS12XSDT

• Module/board Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: -

1
2.3.10
Freescale Semiconductor
Address 0x000C (PRR)
PUPKE
BKPUE
PUPEE
Read: Anytime in single-chip modes.
Write: Anytime, except BKPUE which is writable in Special Single-Chip Mode only.
DDRE
Field
Field
Reset
7-2
7
6
4
W
R
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
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
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
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
PUPKE
Ports ABEK, BKGD pin Pull-up Control Register (PUCR)
1
7
Figure 2-8. Ports ABEK, BKGD pin Pull-up Control Register (PUCR)
= Unimplemented or Reserved
BKPUE
1
6
Table 2-10. PUCR Register Field Descriptions
Table 2-9. DDRE Register Field Descriptions
S12XS Family Reference Manual, Rev. 1.11
0
0
5
PUPEE
1
4
Description
Description
3
0
0
0
0
Port Integration Module (S12XSPIMV1)
2
PUPBE
Access: User read/write
0
1
PUPAE
0
0
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1