MC9328MX21S_08 Datasheet, PDF (12/88 Pages) Freescale Semiconductor, Inc – i.MX family of microprocessors 266 MHz

Specifications
Table 2. i.MX21S Signal Descriptions (Continued)
Signal Name
Function/Notes
KP_ROW[7:0]
Keypad Row selection signals. KP_ROW[7:6] are multiplexed with UART2_RTS and UART2_RXD
signals respectively. Alternatively, KP_ROW7 and KP_ROW6 are available on the internal factory test
signals TEST_WB0 and TEST_WB1 respectively. The Function Multiplexing Control Register in the
System Control chapter must be used in conjunction with programming the GPIO multiplexing (to select
the alternate signal multiplexing) to choose which signals KP_ROW6 and KP_ROW7 are available.
Noisy Supply Pins
NVDD
NVSS
Noisy Supply for the I/O pins. There are six (6) I/O voltages, NVDD1 through NVDD6.
Noisy Ground for the I/O pins
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.MX21S 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
QVDD_max, QVDDX_max
-0.3
2.1
V
2
Input Voltage Range
3
Storage Temperature Range
NVDD_max, VDDA_max
-0.3
V_Imax
-0.3
T_storage
-55
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.
MC9328MX21S Technical Data, Rev. 1.3
12
Freescale Semiconductor