MC9S12XDT256CAA Freescale Semiconductor, MC9S12XDT256CAA Datasheet - Page 774

• 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

Chapter 20 S12X Debug (S12XDBGV3) Module
20.4.5.1.3
Storing with End-Trigger, data is stored in the Trace Buffer until the Final State is entered, at which point
the S12XDBG module will become disarmed and no more data will be stored. If the trigger is at the
address of a change of flow instruction the trigger event will not be stored in the Trace Buffer.
20.4.5.2
The S12XDBG module can operate in four trace modes. The mode is selected using the TRCMOD bits in
the DBGTCR register. In each mode tracing of XGATE or S12XCPU information is possible. The source
for the trace is selected using the TSOURCE bits in the DBGTCR register. The modes are described in the
following subsections. The trace buffer organization is shown in
20.4.5.2.1
In Normal Mode, change of flow (COF) program counter (PC) addresses will be stored.
COF addresses are defined as follows for the S12XCPU:
LBRA, BRA, BSR, BGND as well as non-indexed JMP, JSR, and CALL instructions are not classified as
change of flow and are not stored in the trace buffer.
COF addresses are defined as follows for the XGATE:
Change-of-flow addresses stored include the full 23-bit address bus in the case of S12XCPU, the 16-bit
address bus for the XGATE module and an information byte, which contains a source/destination bit to
indicate whether the stored address was a source address or destination address.
20.4.5.2.2
Loop1 Mode, similarly to Normal Mode also stores only COF address information to the trace buffer, it
however allows the filtering out of redundant information.
The intent of Loop1 Mode is to prevent the Trace Buffer from being filled entirely with duplicate
information from a looping construct such as delays using the DBNE instruction or polling loops using
BRSET/BRCLR instructions. Immediately after address information is placed in the Trace Buffer, the
S12XDBG module writes this value into a background register. This prevents consecutive duplicate
address entries in the Trace Buffer resulting from repeated branches.
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Source address of taken conditional branches (long, short, bit-conditional, and loop primitives)
Destination address of indexed JMP, JSR, and CALL instruction.
Destination address of RTI, RTS, and RTC instructions
Vector address of interrupts, except for SWI and BDM vectors
Source address of taken conditional branches
Destination address of indexed JAL instructions.
First XGATE code address in a thread
Trace Modes
Storing with End-Trigger
Normal Mode
Loop1 Mode
MC9S12XDP512 Data Sheet, Rev. 2.21
Table
20-39.
Freescale Semiconductor