Datasheet

56F8345 Technical Data, Rev. 17
142 Freescale Semiconductor
Preliminary
10.7 Crystal Oscillator Timing
10.8 Reset, Stop, Wait, Mode Select, and Interrupt Timing
3. This is the minimum time required after the PLL set up is changed to ensure reliable operation.
Table 10-15 Crystal Oscillator Parameters
Characteristic Symbol Min Typ Max Unit
Crystal Start-up time T
CS
4510ms
Resonator Start-up time T
RS
0.1 0.18 1 ms
Crystal ESR R
ESR
——120ohms
Crystal Peak-to-Peak Jitter T
D
70 — 250 ps
Crystal Min-Max Period Variation T
PV
0.12 — 1.5 ns
Resonator Peak-to-Peak Jitter T
RJ
——300ps
Resonator Min-Max Period Variation T
RP
——300ps
Bias Current, high-drive mode I
BIASH
—250290μA
Bias Current, low-drive mode I
BIASL
—80110μA
Quiescent Current, power-down mode I
PD
—0 1μA
Table 10-16 Reset, Stop, Wait, Mode Select, and Interrupt Timing
1,2
1. In the formulas, T = clock cycle. For an operating frequency of 60MHz, T = 16.67ns. At 8MHz (used during Reset and
Stop modes), T = 125ns.
2. Parameters listed are guaranteed by design.
Characteristic Symbol
Typical
Min
Typical
Max
Unit See Figure
Minimum RESET
Assertion Duration
t
RA
16T — ns 10-4
Edge-sensitive Interrupt Request Width
t
IRW
1.5T — ns 10-5
IRQA
, IRQB Assertion to General Purpose
Output Valid, caused by first instruction
execution in the interrupt service routine
t
IG
18T — ns 10-6
t
IG
- FAST 14T —
IRQA
Width Assertion to Recover from Stop
State
3
t
IW
1.5T — ns 10-8