MPC852TVR100 Freescale Semiconductor, MPC852TVR100 Datasheet - Page 11

• Manufacturer Part Number: MPC852TVR100
• Description: IC MPU POWERQUICC 100MHZ 256PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MPC852TVR100

• Processor Type: MPC8xx PowerQUICC 32-Bit
• Speed: 100MHz
• Voltage: 1.8V
• Mounting Type: Surface Mount
• Package / Case: 256-PBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

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
these requirements. The MUR420 Schottky diodes control the maximum 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.
Freescale Semiconductor
•
•
V
V
DDL
DDL
must not exceed V
must not exceed 1.9 V, and V
Figure 2. Example Voltage Sequencing Circuit
DDH
MPC852T Hardware Specifications, Rev. 3.1
V
during power-on reset or power down.
DDH
DDH
must not exceed 3.465.
MUR420
1N5820
V
DDL
Figure 2
Mandatory Reset Configurations
can be added to meet
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