Motorola MC9S12C Series, Руководство пользователя

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Device User Guide — 9S12C128DGV1/D V01.05
115
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 B-12 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
f
SCM
1 5.5 MHz
2 D VCO locking range
f
VCO
8 50 MHz
3 D
Lock Detector transition from Acquisition to Tracking
mode
|∆
trk
|
3 4
%
1
NOTES :
1. % deviation from target frequency
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
2. f
OSC
= 4MHz, f
BUS
= 25MHz equivalent f
VCO
= 50MHz: REFDV = #$03, SYNR = #$018, Cs = 4.7nF, Cp = 470pF, Rs =
10K
Ω
.
t
stab
0.5 ms
8 D PLLON Acquisition mode stabilization delay
(2) t
acq
0.3 ms
9 D PLLON Tracking mode stabilization delay
(2) t
al
0.2 ms
10 D Fitting parameter VCO loop gain
K
1
-100 MHz/V
11 D Fitting parameter VCO loop frequency
f
1
60 MHz
12 D Charge pump current acquisition mode
| i
ch
|
38.5
µ
A
13 D Charge pump current tracking mode
| i
ch
|
3.5
µ
A
14 C Jitter fit parameter 1
(2) j
1
1.1 %
15 C Jitter fit parameter 2
(2) j
2
0.13 %