Technical data

Electrical Characteristics
MCIMX31C/MCIMX31LC Technical Data, Rev. 4.3
Freescale Semiconductor 13
Table 9 provides information for interface frequency limits. For more details about clocks characteristics,
see Section 4.3.8, “DPLL Electrical Specifications” on page 31 and Section 4.3.3, “Clock Amplifier
Module (CAMP) Electrical Characteristics” on page 19.
Table 10 shows the fusebox supply current parameters.
1
In read mode, FUSE_VDD should be floated or grounded.
2
Fuses might be inadvertently blown if written to while the voltage is below the minimum.
Table 9. Interface Frequency
ID Parameter Symbol Min Typ Max Units
1 JTAG TCK Frequency f
JTAG
DC 5 10 MHz
2 CKIL Frequency
1
1
CKIL must be driven by an external clock source to ensure proper start-up and operation of the device. CKIL is needed to clock
the internal reset synchronizer, the watchdog, and the real-time clock.
f
CKIL
32 32.768 38.4 kHz
3 CKIH Frequency
2
2
DPTC functionality, specifically the voltage/frequency relation table, is dependent on CKIH frequency. At the time of publication,
standard tables used by Freescale OSs provided for a CKIH frequency of 26 MHz only. Any deviation from this frequency
requires an update to the OS. For more details, refer to the particular OS user's guide documentation. DPTC/DVFS are not
supported for fARM ≤ 400MHz.
f
CKIH
15 26 75 MHz
Table 10. Fusebox Supply Current Parameters
Ref. Num Description Symbol Minimum Typical Maximum Units
1 eFuse Program Current.
1
Current to program one eFuse bit: efuse_pgm = 3.0V
1
The current I
program
is during program time (t
program
).
I
program
—3560mA