MC9S12A256B ETC, MC9S12A256B Datasheet - Page 112

• Manufacturer Part Number: MC9S12A256B
• Description: device made up of standard HCS12 blocks and the HCS12 processor core
• Manufacturer: ETC

MC9S12DP256B Device User Guide — V02.14
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.
Conditions are shown in Table A-4 unless otherwise noted
Num C
NOTES:
1. % deviation from target frequency
2. f
10
11
12
13
14
15
112
1
2
3
4
5
6
7
8
9
10K .
REF
P Self Clock Mode frequency
D VCO locking range
D
D Lock Detection
D Un-Lock Detection
D
C PLLON Total Stabilization delay (Auto Mode)
D PLLON Acquisition mode stabilization delay
D PLLON Tracking mode stabilization delay
D Fitting parameter VCO loop gain
D Fitting parameter VCO loop frequency
D Charge pump current acquisition mode
D Charge pump current tracking mode
C Jitter fit parameter 1
C Jitter fit parameter 2
= 4MHz, f
Lock Detector transition from Acquisition to Tracking
mode
Lock Detector transition from Tracking to Acquisition
mode
BUS
= 25MHz equivalent f
2
2
Rating
Freescale Semiconductor, Inc.
For More Information On This Product,
Table A-16 PLL Characteristics
VCO
Go to: www.freescale.com
= 50MHz: REFDV = #$03, SYNR = #$018, Cs = 4.7nF, Cp = 470pF, Rs =
2
2
2
Symbol
| i
| i
f
f
t
t
SCM
VCO
stab
Lock
acq
K
t
f
ch
ch
j
j
unl
unt
trk
al
1
2
1
1
|
|
|
|
|
|
Min
0.5
1
8
3
0
6
Typ
-120
38.5
0.5
0.3
0.2
3.5
75
Max
0.13
5.5
1.5
2.5
1.1
50
4
8
MHz/V
Unit
MHz
MHz
MHz
%
%
%
%
ms
ms
ms
%
%
A
A
1
1
1
1