SPC5123YVY400B Freescale Semiconductor, SPC5123YVY400B Datasheet - Page 28

• Manufacturer Part Number: SPC5123YVY400B
• Manufacturer: Freescale Semiconductor

Specifications of SPC5123YVY400B

• Lead Free Status / Rohs Status: Compliant

Electrical and Thermal Characteristics
NOTES:
1. The SYS_XTALI frequency, Sys PLL, and CORE PLL settings must be chosen so that the resulting e300 clk, csb_clk, MCK,
frequencies do not exceed their respective maximum or minimum operating frequencies.
2. The values are valid for the user-operation mode. There can be deviations for test modes.
3. The selection of the peripheral clock frequencies needs to take care about requirements for baud rates and minimum frequency
4.The DDR data rate is 2x the DDR memory bus frequency.
See the MPC5121e Reference Manual for more information on the clock subsystem.
3.3.3
The MPC5121e/MPC5123 has three reset pins:
These signals are asynchronous I/O signals and can be asserted at any time. The input side uses a Schmitt trigger and requires
the same input characteristics as other MPC5121e/MPC5123 inputs, as specified in the DC Electrical Specifications section.
As long as VDD is not stable the HRESET output is not stable.
The timing relationship can be seen below.
28
limitation.
•
•
•
PORESET - Power on Reset
HRESET - Hard Reset
SRESET - Software Reset
NFC Clock
DIU Clock
SDHC Clock
MBX Clock
Resets
1
2
3
PORESET
PORESET rise time
HRESET
HRESET rise time
SRESET fall time
SRESET rise time
Make sure that the PORESET does not carry any glitches. The
MPC5121e/MPC5123 has no filter to prevent them from getting into the chip.
HRESET and SRESET must have a monotonous rise time.
The assertion of HRESET becomes active at Power on Reset without any
SYS_XTALI clock.
2,3
Description
1
fall time
fall time
Table 16. Clock Frequencies (continued)
MPC5121E/MPC5123 Data Sheet, Rev. 3
Table 17. Reset Rise / Fall Timing
2.08
0.78
0.78
6.25
Min
Min
—
—
—
—
—
—
Max
1
1
1
1
1
1
Max
66.6
100
100
83
Unit
ms
ms
ms
ms
ms
ms
Units
MHz
MHz
MHz
MHz
SpecID
A3.4
A3.6
A3.7
A3.8
A3.5
A3.9
Freescale Semiconductor
SpecID
A1.10
A1.7
A1.8
A1.9