S912XEG128J2MAA Datasheet, PDF (1241/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Appendix A Electrical Characteristics
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.
Table A-25. IPLL 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}⁽¹⁾
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⁾
5 D Un-Lock Detection
|∆_unl|
0.5
—
2.5
%²
7 C Time to lock
8 C _{Jitter fit parameter 1}⁽³⁾
t_lock
—
214
150 +
256/f_REF
µs
j₁
—
—
1.2
%
9 C _{Jitter fit parameter 2}³
j₂
—
—
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
1. Bus frequency is equivalent to f_SCM/2
2. % deviation from target frequency
3. f_OSC = 4MHz, f_BUS = 50MHz equivalent f_PLL = 100MHz: REFDIV=$01, REFRQ=01, SYNDIV=$18, VCOFRQ=11, POSTDIV=$
00.
A.7 External Interface Timing
A.7.1
MSCAN
Table A-26. MSCAN Wake-up Pulse Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
1 P MSCAN wakeup dominant pulse filtered
2 P MSCAN wakeup dominant pulse pass
Symbol
Min
Typ
t_WUP
—
—
t_WUP
5
—
Max
Unit
1.5
µs
—
µs
A.7.2 SPI Timing
This section provides electrical parametrics and ratings for the SPI. In Table A-27 the measurement
conditions are listed.
Freescale Semiconductor
MC9S12XE-Family Reference Manual Rev. 1.25
1241