Motorola MC9S12DT128B Table A-16 PLL Characteristics, 提供单片机解密、IC解密、芯片解密业务 010-62245566, Δtrk

MC9S12DT128B Device User Guide — V01.07

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-4unless 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	Δtrk	3		4	%1
		mode
4	D	Lock Detection	ΔLock	0		1.5	%(1)
5	D	Un-Lock Detection	Δunl	0.5		2.5	%(1)
6	D	Lock Detector transition from Tracking to Acquisition	Δunt	6		8	%(1)
		mode
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 1(2)	j1			1.1	%
15	C	Jitter fit parameter 2(2)	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.

108

http://www.xinpian.net 提供单片机解密、IC解密、芯片解密业务 010-62245566 13810019655