MC9328MX21 Datasheet, PDF (15/106 Pages) Motorola, Inc – i.MX family of microprocessors

Signal Name
VDDA
(formally AVDD)
QVSS (internally
connected to AVSS)
QVDD
QVSS
QVDDX
Table 2. i.MX21 Signal Descriptions (Continued)
Function/Notes
Supply Pins – Analog Modules
Supply for analog blocks
Quiet GND for analog blocks (QVSS and AVSS are synonymous)
Internal Power Supply
Power supply pins for silicon internal circuitry
Quiet GND pins for silicon internal circuitry
Power supply pin for the ARM core, connect directly to QVDD
Specifications
3 Specifications
This section contains the electrical specifications and timing diagrams for the i.MX21 processor.
3.1 Maximum Ratings
Table 3 provides information on maximum ratings.
Table 3. Maximum Ratings
Rating
Symbol
Minimum
Maximum
Unit
Supply voltage
V_dd
-0.3
3.3
V
Maximum operating temperature range of i.MX21
T_A
- 40 / -30 / 0
70 / 85
°C
Storage temperature
Test
-55
150
°C
3.2 Recommended Operating Range
Table 4 provides the recommended operating ranges for the supply voltages. The i.MX21 processor has multiple
pairs of VDD and VSS power supply and return pins. QVDD, QVDDx, and QVSS pins are used for internal logic.
All other VDD and VSS pins are for the I/O pads voltage supply, and each pair of VDD and VSS provides power
to the enclosed I/O pads. This design allows different peripheral supply voltage levels in a system.
Because AVDD pins are supply voltages to the analog pads, it is recommended to isolate and noise-filter the
AVDD pins from other VDD pins.
For more information about I/O pads grouping per VDD, please refer to Table 4 on page 15.
Table 4. Recommended Operating Range
I/O supply voltage
I/O supply voltage
Rating
Symbol
Minimum Maximum Unit
NVDD 2, 3, 4, 5, 6
2.70
NVDD 1
1.70
3.30
V
3.30
V
MC9328MX21 Product Preview, Rev. 1.1
Freescale Semiconductor
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