MPC852TVR50A Freescale Semiconductor, MPC852TVR50A Datasheet - Page 12

• Manufacturer Part Number: MPC852TVR50A
• Description: IC MPU POWERQUICC 50MHZ 256PBGA
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC Ir

Specifications of MPC852TVR50A

• Processor Type: MPC8xx PowerQUICC 32-Bit
• Speed: 50MHz
• Voltage: 1.8V
• Mounting Type: Surface Mount
• Package / Case: 256-PBGA
• Processor Series: MPC8xx
• Core: MPC8xx
• Data Bus Width: 32 bit
• Development Tools By Supplier: MPC852TADS-KIT
• Maximum Clock Frequency: 50 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Data Ram Size: 8 KB
• I/o Voltage: 3.3 V
• Interface Type: SPI, UART
• Minimum Operating Temperature: 0 C
• Program Memory Size: 4 KB
• Program Memory Type: EPROM/Flash
• Core Size: 32 Bit
• Cpu Speed: 50MHz
• Embedded Interface Type: SPI
• Digital Ic Case Style: BGA
• No. Of Pins: 256
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Power Supply and Power Sequencing
9
This section provides design considerations for the MPC852T power supply. The MPC852T has a core
voltage (V
The I/O section of the MPC852T is supplied with 3.3 V across V
The signals PA[0:3], PA[8:11], PB15, PB[24:25]; PB[28:31], PC[4:7], PC[12:13], PC15] PD[3:15], TDI,
TDO, TCK, TRST, TMS, MII_TXEN, MII_MDIO are 5-V tolerant. All inputs cannot be more than 2.5 V
greater than V
exceed 3.465 V. This restriction applies to power-on reset or power down and normal operation.
One consequence of multiple power supplies is that when power is initially applied, the voltage rails ramp
up at different rates. The rates depend on the nature of the power supply, the type of load on each power
supply, and the manner in which different voltages are derived. The following restrictions apply:
These cautions are necessary for the long-term reliability of the part. If they are violated, the electrostatic
discharge (ESD) protection diodes are forward-biased, and excessive current can flow through these
diodes. If the system power supply design does not control the voltage sequencing, the circuit shown in
Figure 3
potential difference between the external bus and core power supplies on power-on reset, and the 1N5820
diodes regulate the maximum potential difference on power-down.
10 Mandatory Reset Configurations
The MPC852T requires a mandatory configuration during reset.
If hardware reset configuration word (HRCW) is enabled, by asserting the RSTCONF during HRESET
assertion, the HRCW[DBGC] value that is needed to be set to binary X1 in the hardware reset
configuration word (HRCW) and the SIUMCR[DBGC] should be programmed with the same value in the
boot code after reset.
If hardware reset configuration word (HRCW) is disabled, by negating the RSTCONF during the
HRESET assertion, the SIUMCR[DBGC] should be programmed with binary X1 in the boot code after
reset.
12
•
•
Power Supply and Power Sequencing
V
V
can be added to meet these requirements. The MUR420 Schottky diodes control the maximum
DDL
DDL
DDL
DDH
must not exceed V
must not exceed 1.9 V, and V
) and PLL voltage (V
. In addition, 5-V tolerant pins can not exceed 5.5 V, and the remaining input pins cannot
MPC852T PowerQUICC™ Hardware Specifications, Rev. 4
Figure 3. Example Voltage Sequencing Circuit
DDH
DDSYN
V
DDH
during power-on reset or power down.
) that operates at a lower voltage than the I/O voltage V
DDH
MUR420
must not exceed 3.465.
1N5820
V
DDH
DDL
and V
SS
(GND).
Freescale Semiconductor
DDH
.