MCF5282 Datasheet, PDF (692/766 Pages) Freescale Semiconductor, Inc – Microcontroller User’s Manual

Electrical Characteristics
6 _{Load Capacitance determined from crystal manufacturer specifications and will include circuit board parasitics.}
7 _{This specification applies to the period required for the PLL to relock after changing the MFD frequency control bits in the}
synthesizer control register (SYNCR).
8 _{Assuming a reference is available at power up, lock time is measured from the time VDD and VDDPLL are valid to}
RSTO negating. If the crystal oscillator is being used as the reference for the PLL, then the crystal start up time
must be added to the PLL lock time to determine the total start-up time.
9 _{PLL is operating in 1:1 PLL mode.}
10 _{Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum fsys.}
Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal.
Noise injected into the PLL circuitry via V_DDPLL and V_SSPLL and variation in crystal oscillator frequency increase the
Cjitter percentage for a given interval
11 _{Based on slow system clock of 40 MHz measured at fsys max.}
33.6 QADC Electrical Characteristics
Table 33-9. QADC Absolute Maximum Ratings
Parameter
Symbol
Min
Max
Unit
Analog Supply, with reference to V_SSA
Internal Digital Supply ¹, with reference to V_SS
V_DDA
–0.3
6.0
V
V_DD
–0.3
4.0
V
Reference Supply, with reference to V_RL
V_RH
–0.3
6.0
V
V_SS Differential Voltage
V_DD Differential Voltage ²
V_SS – V_SSA
–0.1
0.1
V
V_DD – V_DDA
–6.0
4.0
V
V_REF Differential Voltage
V_RH to V_DDA Differential Voltage ³
V_RH – V_RL
–0.3
6.0
V
V_RH – V_DDA
–6.0
6.0
V
V_RL to V_SSA Differential Voltage
V_RL – V_SSA
–0.3
0.3
V
V_DDH to V_DDA Differential Voltage
V_DDH – V_DDA
–1.0
1.0
V
Maximum Input Current ^{4, 5, 6}
I_MA
–25
25
mA
1 _{For internal digital supply of VDD = 3.3V typical.}
2 _{Refers to allowed random sequencing of power supplies.}
3 _{Refers to allowed random sequencing of power supplies.}
4 _{Transitions within the limit do not affect device reliability or cause permanent damage. Exceeding limit may cause}
permanent conversion error on stressed channels and on unstressed channels.
5 _{Input must be current limited to the value specified. To determine the value of the required current-limiting resistor,}
calculate resistance values using V_POSCLAMP = V_DDA + 0.3V and V_NEGCLAMP = –0.3 V, then use the larger of the
calculated values.
6 _{Condition applies to one pin at a time.}
33-8
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Freescale Semiconductor