MC9S12XDT256CAA Freescale Semiconductor, MC9S12XDT256CAA Datasheet - Page 849

• Manufacturer Part Number: MC9S12XDT256CAA
• Description: IC MCU 256K FLASH 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XDT256CAA

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 80MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 59
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Processor Series: S12XD
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: CAN/I2C/SCI/SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 59
• Number Of Timers: 12
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: EVB9S12XDP512E
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.3.2.32 Port M Data Direction Register (DDRM)
Read: Anytime.
Write: Anytime.
This register configures each port M pin as either input or output.
The CAN/SCI3 forces the I/O state to be an output for each port line associated with an enabled output
(TXCAN[3:0], TXD3). TheyAlso forces the I/O state to be an input for each port line associated with an
enabled input (RXCAN[3:0], RXD3). 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.
Freescale Semiconductor
DDRM[7:0]
Reset
Field
7–0
W
R
DDRM7
Data Direction Port M
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 PTM or PTIM registers, when changing the DDRM register.
DDRM6
0
6
Figure 22-34. Port M Data Direction Register (DDRM)
Table 22-33. DDRM Field Descriptions
DDRM5
MC9S12XDP512 Data Sheet, Rev. 2.21
0
5
DDRM4
0
4
Description
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
DDRM3
0
3
DDRM2
0
2
DDRM1
0
1
DDRM0
0
0
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