Datasheet

Appendix A Electrical Characteristics
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 1241
This is important to note with respect to timers, serial modules where a prescaler will eliminate the effect
of the jitter to a large extent.
A.7 External Interface Timing
A.7.1 MSCAN
A.7.2 SPI Timing
This section provides electrical parametrics and ratings for the SPI. In Table A-27 the measurement
conditions are listed.
Table A-25. IPLL Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C Rating Symbol Min Typ Max Unit
1P
Self Clock Mode frequency
(1)
1. Bus frequency is equivalent to f
SCM
/2
f
SCM
1
—
4 MHz
2 C VCO locking range
f
VCO
32
—
120 MHz
3 C Reference Clock
f
REF
1
—
40 MHz
4 D Lock Detection
|∆
Lock
|
0
—
1.5
%
(2)
2. % deviation from target frequency
5 D Un-Lock Detection
|∆
unl
|
0.5
—
2.5
%
2
7 C Time to lock
t
lock
—
214
150 +
256/f
REF
µs
8C
Jitter fit parameter 1
(3)
3. f
OSC
= 4MHz, f
BUS
= 50MHz equivalent f
PLL
= 100MHz: REFDIV=$01, REFRQ=01, SYNDIV=$18, VCOFRQ=11, POSTDIV=$
00.
j
1
——
1.2 %
9C
Jitter fit parameter 2
3
j
2
——
0%
10 D Bus Frequency for FM1=1, FM0=1 (frequency
modulation in PLLCTL register of s12xe_crg)
f
bus
— — 48 MHz
11 D Bus Frequency for FM1=1, FM0=0 (frequency
modulation in PLLCTL register of s12xe_crg)
f
bus
— — 49 MHz
12 D Bus Frequency for FM1=0, FM0=1 (frequency
modulation in PLLCTL register of s12xe_crg)
f
bus
— — 49 MHz
Table A-26. MSCAN Wake-up Pulse Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C Rating Symbol Min Typ Max Unit
1 P MSCAN wakeup dominant pulse filtered t
WUP
— — 1.5 µs
2 P MSCAN wakeup dominant pulse pass t
WUP
5——µs