MPC5125YVN400 Freescale Semiconductor, MPC5125YVN400 Datasheet - Page 259

• Manufacturer Part Number: MPC5125YVN400
• Description: IC MCU 32BIT E300 324TEPBGA
• Manufacturer: Freescale Semiconductor
• Series: MPC51xxr

Specifications of MPC5125YVN400

• Core Processor: e300
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, USB OTG
• Peripherals: DMA, WDT
• Number Of I /o: 64
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.33 V ~ 1.47 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 324-PBGA
• Processor Series: MPC51xx
• Core: e300
• Data Bus Width: 32 bit
• Development Tools By Supplier: TWR-MPC5125-KIT, TWR-SER, TWR-ELEV, TOWER
• Maximum Clock Frequency: 400 MHz
• Operating Supply Voltage: 1.4 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Data Ram Size: 32 KB
• I/o Voltage: 3.3 V
• Interface Type: CAN, I2C
• Minimum Operating Temperature: - 40 C
• Program Memory Size: 32 bit
• Cpu Speed: 400MHz
• Embedded Interface Type: CAN, I2C, SPI, UART, USB
• Digital Ic Case Style: TEPBGA
• No. Of Pins: 324
• Rohs Compliant: Yes
• Cpu Family: MPC5xx
• Device Core Size: 32b
• Frequency (max): 400MHz
• Total Internal Ram Size: 32KB
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 324
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The DMA becomes idle or services the next channel.
9.3.5
9.3.5.1
There are two methods to test for minor loop completion when using software initiated service requests.
The first method is to read the TCD.CITER field and test for a change. Another method may be extracted
from the sequence shown below. The second method is to test the TCD.START bit and the TCD.ACTIVE
bit. The minor loop complete condition is indicated by both bits reading zero after the TCD.START was
written to a one. Polling the TCD.ACTIVE bit may be inconclusive because the active status may be
missed if the channel execution is short in duration.
The TCD status bits execute the following sequence for a software activated channel:
The best method to test for minor loop completion when using hardware initiated service requests is to
read the TCD.CITER field and test for a change. The hardware request and acknowledge handshakes
signals are not visible in the programmer’s model.
The TCD status bits execute the following sequence for a hardware activated channel:
For both activation types, the major loop complete status is explicitly indicated via the TCD.DONE bit.
The TCD.START bit is cleared automatically when the channel begins execution regardless of how the
channel was activated.
Freescale Semiconductor
14. DMA_ENGINE writes: TCD.SADDR = 0x1000, TCD.DADDR = 0x2000, TCD.CITER = 2
15. DMA_ENGINE writes: TCD.ACTIVE = 0, TCD.DONE = 1, DMAINT[n] = 1.
16. The channel retires → major loop complete.
1. TCD.START = 1, TCD.ACTIVE = 0, TCD.DONE = 0 (channel service request via software).
2. TCD.START = 0, TCD.ACTIVE = 1, TCD.DONE = 0 (channel is executing).
3. TCD.START = 0, TCD.ACTIVE = 0, TCD.DONE = 0 (channel completed minor loop and is idle).
4. TCD.START = 0, TCD.ACTIVE = 0, TCD.DONE = 1 (channel completed major loop and is idle).
1. IPD_REQ asserts (channel service request via hardware).
2. TCD.START = 0, TCD.ACTIVE = 1, TCD.DONE = 0 (channel is executing).
3. TCD.START = 0, TCD.ACTIVE = 0, TCD.DONE = 0 (channel completed minor loop and is idle).
4. TCD.START = 0, TCD.ACTIVE = 0, TCD.DONE = 1 (channel completed major loop and is idle).
g) READ_BYTE(0x101C), READ_BYTE(0x101D), READ_BYTE(0x101E),
h) WRITE_WORD(0x201C) → last iteration of the minor loop → major loop complete.
(TCD.BITER).
READ_BYTE(0x101F).
TCD Status
Minor Loop Complete
MPC5125 Microcontroller Reference Manual, Rev. 2
Direct Memory Access (DMA)
9-39