LFEBS12UB Freescale Semiconductor, LFEBS12UB Datasheet - Page 169

KIT STUDENT LEARNING S12 DG128

LFEBS12UB

Manufacturer Part Number
LFEBS12UB
Description
KIT STUDENT LEARNING S12 DG128
Manufacturer
Freescale Semiconductor
Datasheets

Specifications of LFEBS12UB

Architecture
8/16-bit
Code Gen Tools Included
Code Warrior
Silicon Manufacturer
Freescale
Core Architecture
S12
Core Sub-architecture
S12
Silicon Core Number
MC9S12
Silicon Family Name
S12D
Kit Contents
HCS12 DG128 Learning Kit
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
1. Read: Anytime.
1. Read: Anytime.
2.3.87
2.3.88
Freescale Semiconductor
Address 0x036A
Address 0x036B
Write: Anytime.
Write: Anytime.
DDRR
Field
Reset
Reset
7-0
W
W
R
R
Port R data direction—
This register controls the data direction of pins 7 through 0.
The TIM forces the I/O state to be an output for each timer port associated with an enabled output compare. In this
case the data direction bits will not change.
The data direction bits revert to controlling the I/O direction of a pin when the associated timer output compare is
disabled.
The timer Input Capture always monitors the state of the pin.
1 Associated pin is configured as output.
0 Associated pin is configured as high-impedance input.
DDRR7
RDRR7
Port R Data Direction Register (DDRR)
Port R Reduced Drive Register (RDRR)
0
0
7
7
Due to internal synchronization circuits, it can take up to 2 bus clock cycles
until the correct value is read on PTR or PTIR registers, when changing the
DDRR register.
DDRR6
RDRR6
0
0
6
6
Figure 2-86. Port R Reduced Drive Register (RDRR)
Figure 2-85. Port R Data Direction Register (DDRR)
Table 2-83. DDRR Register Field Descriptions
MC9S12XE-Family Reference Manual , Rev. 1.23
DDRR5
RDRR5
0
0
5
5
DDRR4
RDRR4
NOTE
0
0
4
4
Description
DDRR3
RDRR3
3
0
3
0
Chapter 2 Port Integration Module (S12XEPIMV1)
DDRR2
RDRR2
0
0
2
2
Access: User read/write
Access: User read/write
DDRR1
RDRR1
0
0
1
1
DDRR0
RDRR0
0
0
0
0
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