LFEBS12UB Freescale Semiconductor, LFEBS12UB Datasheet - Page 156

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

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.
Chapter 2 Port Integration Module (S12XEPIMV1)
2.3.64
156
Address 0x026B
Write: Anytime.
DDRJ
DDRJ
RDRJ
Field
Field
Reset
7-0
1
0
W
R
Port J data direction—
This register controls the data direction of pin 1.
The enabled SCI2 forces the I/O state to be an output. The DDRM bits revert to controlling the I/O direction of a pin
when the associated peripheral module is disabled.
1 Associated pin is configured as output.
0 Associated pin is configured as input.
Port J data direction—
This register controls the data direction of pin 0.
The enabled SCI3 or CS3 signal forces the I/O state to be an output. In those cases the data direction bits will not
change. The DDRM bits revert to controlling the I/O direction of a pin when the associated peripheral module is
disabled.
1 Associated pin is configured as output.
0 Associated pin is configured as input.
Port J reduced drive—Select reduced drive for outputs
This register configures the drive strength of output pins 7 through 0 as either full or reduced independent of the
function used on the pins. If a pin is used as input this bit has no effect.
1 Reduced drive selected (approx. 1/5 of the full drive strength).
0 Full drive strength enabled.
RDRJ7
Port J Reduced Drive Register (RDRJ)
0
7
Due to internal synchronization circuits, it can take up to 2 bus clock cycles
until the correct value is read on PTH or PTIH registers, when changing the
DDRH register.
RDRJ6
Table 2-59. DDRJ Register Field Descriptions (continued)
0
6
Figure 2-62. Port J Reduced Drive Register (RDRJ)
Table 2-60. RDRJ Register Field Descriptions
MC9S12XE-Family Reference Manual , Rev. 1.23
RDRJ5
0
5
RDRJ4
NOTE
0
4
Description
Description
RDRJ3
3
0
RDRJ2
0
2
Access: User read/write
Freescale Semiconductor
RDRJ1
0
1
RDRJ0
0
0
(1)