MC9S12XDT512MAA Freescale, MC9S12XDT512MAA Datasheet - Page 843

• Manufacturer Part Number: MC9S12XDT512MAA
• Manufacturer: Freescale

Specifications of MC9S12XDT512MAA

• Cpu Family: HCS12
• Device Core Size: 16b
• Frequency (max): 40MHz
• Interface Type: CAN/I2C/SCI/SPI
• Total Internal Ram Size: 32KB
• # I/os (max): 59
• Number Of Timers - General Purpose: 12
• Operating Supply Voltage (typ): 2.5/5V
• Operating Supply Voltage (max): 2.75/5.5V
• Operating Supply Voltage (min): 2.35/3.15V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 512KB
• Lead Free Status / RoHS Status: Compliant

22.3.2.25 Port S Data Direction Register (DDRS)
Read: Anytime.
Write: Anytime.
This register configures each port S pin as either input or output.
If SPI0 is enabled, the SPI0 determines the pin direction. Refer to SPI section for details.
If the associated SCI transmit or receive channel is enabled this register has no effect on the pins. The pin
is forced to be an output if a SCI transmit channel is enabled, it is forced to be an input if the SCI receive
channel is enabled.
The DDRS bits revert to controlling the I/O direction of a pin when the associated channel is disabled.
Freescale Semiconductor
DDRS[7:0]
Reset
Field
7–0
W
R
DDRS7
Data Direction Port S
0 Associated pin is configured as input.
1 Associated pin is configured as output.
Note: Due to internal synchronization circuits, it can take up to 2 bus clock cycles until the correct value is read
0
7
on PTS or PTIS registers, when changing the DDRS register.
DDRS6
0
6
Figure 22-27. Port S Data Direction Register (DDRS)
Table 22-27. DDRS Field Descriptions
DDRS5
MC9S12XDP512 Data Sheet, Rev. 2.21
0
5
DDRS4
0
4
Description
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
DDRS3
0
3
DDRS2
0
2
DDRS1
0
1
DDRS0
0
0
845