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MC9S12DP256B Datasheet, PDF (110/126 Pages) Freescale Semiconductor, Inc – device made up of standard HCS12 blocks and the HCS12 processor core
MC9S12DP256B Device User GFuirdeee—scV0a2.l1e5 Semiconductor, Inc.
This is very important to notice with respect to timers, serial modules where a pre-scaler will eliminate the
effect of the jitter to a large extent.
Table A-16 PLL Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
Symbol Min
Typ
Max Unit
1 P Self Clock Mode frequency
fSCM
1
5.5
MHz
2 D VCO locking range
fVCO
8
50
MHz
3
D
Lock Detector transition from Acquisition to Tracking
mode
|∆trk|
3
4
%1
4 D Lock Detection
|∆Lock|
0
1.5
%1
5 D Un-Lock Detection
|∆unl|
0.5
2.5
%1
6
D
Lock Detector transition from Tracking to Acquisition
mode
|∆unt|
6
8
%1
7 C PLLON Total Stabilization delay (Auto Mode) 2
tstab
0.5
ms
8 D PLLON Acquisition mode stabilization delay 2
tacq
0.3
ms
9 D PLLON Tracking mode stabilization delay 2
tal
0.2
ms
10 D Fitting parameter VCO loop gain
K1
-120
MHz/V
11 D Fitting parameter VCO loop frequency
f1
75
MHz
12 D Charge pump current acquisition mode
| ich |
38.5
µA
13 D Charge pump current tracking mode
| ich |
3.5
µA
14 C Jitter fit parameter 12
j1
1.1
%
15 C Jitter fit parameter 22
j2
0.13
%
NOTES:
1. % deviation from target frequency
2. fREF = 4MHz, fBUS = 25MHz equivalent fVCO = 50MHz: REFDV = #$03, SYNR = #$018, Cs = 4.7nF, Cp = 470pF, Rs =
10KΩ.
112
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