MPC5125YVN400 Freescale Semiconductor, MPC5125YVN400 Datasheet - Page 808

• 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

Secure Digital Host Controller (SDHC)
After the card is reset, the host needs to validate the voltage range of the card. See
software flow to reset both SDHC and the card.
software_reset()
{
write_reg(SDHC_STR_STP_CLK, 0x8);
write_reg(SDHC_STR_STP_CLK, 0x9);// 1. reset the SDHC host;
write_reg(SDHC_STR_STP_CLK, 0x1);
write_reg(SDHC_STR_STP_CLK, 0x1);
write_reg(SDHC_STR_STP_CLK, 0x1);
write_reg(SDHC_STR_STP_CLK, 0x1);
28-36
•
•
Software reset (Host Only) proceeds by the write operation on the SDHC_STR_STP_CLK
register. Follow the recommended sequence as specified in
Control (SDHC_STR_STP_CLK) Register.”
not reset the card. The card reset is through CMD0. After you apply software reset to SDHC, it
should also use CMD0 to reset the card in case the card is in an unknown state. Write 0x2 to the
SDHC_STR_STP_CLK register and poll status[8] to wait until the clock is on. It is highly
recommended to start clock here and leave the clock unchanged afterwards.
Card is reset (Card Only). The command, Go_Idle_State, CMD0 is the software reset command for
the MMC and SD memory card. This sets each card into idle state regardless of the current card
state. When used as a SD I/O Card, CMD52 writes IO reset in CCCR. The cards are initialized with
a default relative card address (RCA = 0x0000) and with a default driver stage register setting
(lowest speed, highest driving current capability).
Figure 28-24. Flow Chart for Reset of SDHC and SD I/O Card
MPC5125 Microcontroller Reference Manual, Rev. 2
Send CMD0/CMD52 to Card to Reset Card
Write 0x3F to SDHC_CLK_RATE Register
Write 0x08 to SDHC_STR_STP_CLK
Write 0x1 to STR_STP_CLK 8 Times
Write 0x9 to SDHC_STR_STP_CLK
Set bit 1 of SDHC_STR_STP_CLK
and waitfor clock on
Voltage Validation
The reset can reset all the SDHC registers, but does
Section 28.3.2.1, “SDHC Clock
Figure 28-24
Freescale Semiconductor
for the