MC9S12XET256MAA Freescale Semiconductor, MC9S12XET256MAA Datasheet - Page 131

• Manufacturer Part Number: MC9S12XET256MAA
• Description: MCU 16BIT 256K FLASH 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XET256MAA

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 50MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, 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): 1.72 V ~ 5.5 V
• Data Converters: A/D 12x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-QFP
• Processor Series: S12XE
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: CAN, SCI, SPI
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 59
• Number Of Timers: 25
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: KIT33812ECUEVME, EVB9S12XEP100, DEMO9S12XEP100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Package: 80PQFP
• Family Name: HCS12X
• Maximum Speed: 50 MHz
• Operating Supply Voltage: 1.8|2.8|5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. Read: Anytime.
2.3.32
Freescale Semiconductor
Address 0x024B
Write: Anytime.
DDRS
RDRS
Field
Field
Reset
7-0
7-0
W
R
Port S data direction—
This register controls the data direction of pins 7 through 0.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 data direction bits revert to controlling the I/O direction of a pin when the associated channel is disabled.
1 Associated pin is configured as output.
0 Associated pin is configured as input.
Port S 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.
RDRS7
Port S Reduced Drive Register (RDRS)
0
7
Due to internal synchronization circuits, it can take up to 2 bus clock cycles
until the correct value is read on PTS or PTIS registers, when changing the
DDRS register.
RDRS6
0
6
Figure 2-30. Port S Reduced Drive Register (RDRS)
Table 2-28. DDRS Register Field Descriptions
Table 2-29. RDRS Register Field Descriptions
MC9S12XE-Family Reference Manual , Rev. 1.23
RDRS5
0
5
RDRS4
NOTE
0
4
Description
Description
RDRS3
3
0
Chapter 2 Port Integration Module (S12XEPIMV1)
RDRS2
0
2
Access: User read/write
RDRS1
0
1
RDRS0
0
0
131
(1)