MC9328MX21_10 Datasheet, PDF (14/100 Pages) Freescale Semiconductor, Inc – 266 MHz i.MX family of microprocessors

Specifications
Table 2. i.MX21 Signal Descriptions (Continued)
Signal Name
Function/Notes
Supply Pins – Analog Modules
VDDA
Supply for analog blocks
QVSS (internally Quiet GND for analog blocks (QVSS and AVSS are synonymous)
connected to AVSS)
Internal Power Supplies
QVDD
QVSS
QVDDX
Power supply pins for silicon internal circuitry
Quiet GND pins for silicon internal circuitry
Power supply pin for the ARM core. Externally connect directly to QVDD
3 Specifications
This section contains the electrical specifications and timing diagrams for the i.MX21 processor.
3.1 Maximum Ratings
Table 3 provides the maximum ratings.
CAUTION
Stresses beyond those listed under “Maximum Ratings,” (Table 3) may cause
permanent damage to the device. These are stress ratings only. Functional operation
of the device at these or any other conditions beyond those indicated under
“266 MHz Recommended Operating Range” (Table 4) is not implied. Exposure to
maximum-rated conditions for extended periods may affect device reliability.
Table 3. Maximum Ratings
Ref. Num
Parameter
Symbol
Min
Max
Units
1
Supply Voltage
2
Input Voltage Range
3
Storage Temperature Range
QVDD_max, QVDDX_max
-0.3
NVDD_max, VDDA_max
-0.3
V_Imax
-0.3
T_storage
-55
2.1
V
3.3
V
VDD + 0.3¹
V
150
o_C
1. VDD is the supply voltage associated with the input. See Signal Multiplexing Scheme table in the reference manual.
3.2 Recommended Operating Range
Table 4 provides the recommended operating ranges. The device 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 VDDA pins are supply voltages to the analog pads, it is recommended to isolate and noise-filter
the VDDA pins from other VDD pins.
MC9328MX21 Technical Data, Rev. 3.4
14
Freescale Semiconductor