i.MX31/i.MX31L Advance Information, Rev. 2.3
12
Freescale Semiconductor
Electrical Characteristics
Table 7
provides the operating ranges.
NOTE
The term NVCC in this section refers to the associated supply rail of an
input or output. The association is shown in the Signal Multiplexing chapter
of the reference manual.
CAUTION
NVCC6 and NVCC9 must be at the same voltage potential. These supplies
are connected together on-chip to optimize ESD damage immunity.
Table 7. Operating Ranges
Symbol
Parameter
Min
Max
Units
QVCC,
QVCC1,
QVCC4
Core Operating Voltage
1
1
Measured at package balls, including peripherals, ARM, and L2 cache supplies (QVCC, QVCC1, QVCC4, respectively).
2
Supply voltage is considered “overdrive” for voltages above 1.47 V. Operation time in overdrive—whether switching or
not—must be limited to a cumulative duration of 1.25 years (10,950 hours) or less to sustain the maximum operating voltage
without significant device degradation—for example, 25% (average 6 hours out of 24 yours per day) duty cycle for 5-year rated
equipment. To tolerate the maximum operating overdrive voltage for 10 years, the device must have a duty cycle of 12.5% or
less in overdrive (for example 3 out of 24 hours per day). Below 1.47V, duty cycle restrictions may apply for equipment rated
above 5 years.
3
The SR voltage is applied to QVCC, QVCC1, and QVCC4 after the device is placed in SR mode.
The Real-Time Clock (RTC)
is operational in State Retention (SR) mode.
4
Overshoot and undershoot conditions (transitions above NVCC and below GND) on I/O must be held below 0.6 V, and the
duration of the overshoot/undershoot must not exceed 10% of the system clock cycle. Overshoot/undershoot must be
controlled through printed circuit board layout, transmission line impedance matching, signal line termination, or other
methods. Non-compliance to this specification may affect device reliability or cause permanent damage to the device.
5
Supply voltage is considered “overdrive” for voltages above 3.1 V. Operation time in overdrive—whether switching or
not—must be limited to a cumulative duration of 1 year (8,760 hours) or less to sustain the maximum operating voltage without
significant device degradation—for example, 20% (average 4.8 hours out of 24 hours per day) duty cycle for 5-year rated
equipment. Operation at 3.3 V that exceeds a cumulative 3,504 hours may cause non-operation whenever supply voltage is
reduced to 1.8 V; degradation may render the device too slow or inoperable. Below 3.1 V, duty cycle restrictions may apply for
equipment rated above 5 years.
V
0
≤
f
ARM
≤
400 MHz, non-overdrive
0
≤
f
ARM
≤
400 MHz, overdrive
2
0
≤
f
ARM
≤
532 MHz, overdrive
2
1.22
>1.47
1.55
0.95
1.75
>3.1
1.75
1.47
1.65
1.65
–
3.1
3.3
1.95
State Retention Voltage
3
I/O Supply Voltage, except DDR
4
NVCC1,
NVCC3–10
NVCC2,
NVCC21,
NVCC22
FVCC, MVCC,
SVCC, UVCC
non-overdrive
overdrive
5
V
I/O Supply Voltage, DDR only
V
PLL (Phase-Locked Loop) and FPM (Frequency Pre-multiplier) Supply Voltage
6
non-overdrive
overdrive
2
1.3
>1.47
1.6
1.65
3.0
0
1.47
1.6
1.9
1.95
3.3
70
V
IOQVDD
On-device Level Shifter Supply Voltage
Fusebox read Supply Voltage
Fusebox write (program) Supply Voltage
7
Operating Ambient Temperature Range
V
V
V
o
C
FUSE_VDD
T
A