MC9S08MM128 Datasheet, PDF (33/50 Pages) Freescale Semiconductor, Inc – Advanced Information

Preliminary Electrical Characteristics
3 _{This specification applies to any time the PLL VCO divider or reference divider is changed, or changing from PLL}
disabled (BLPE, BLPI) to PLL enabled (PBE, PEE). If a crystal/resonator is being used as the reference, this
specification assumes it is already running.
4 _{Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum fBUS.}
Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal.
Noise injected into the FLL circuitry via V_DD and V_SS and variation in crystal oscillator frequency increase the C_Jitter
percentage for a given interval.
5 _{625 ns represents 5 time quanta for CAN applications, under worst-case conditions of 8 MHz CAN bus clock, 1 Mbps}
CAN Bus speed, and 8 time quanta per bit for bit time settings. 5 time quanta is the minimum time between a
synchronization edge and the sample point of a bit using 8 time quanta per bit.
6 _{Below Dlock minimum, the MCG is guaranteed to enter lock. Above Dlock maximum, the MCG will not enter lock. But}
if the MCG is already in lock, then the MCG may stay in lock.
7 _{Below Dunl minimum, the MCG will not exit lock if already in lock. Above Dunl maximum, the MCG is guaranteed to exit}
lock.
Table 18. XOSC (Temperature Range = –40 to 105°C Ambient)
#
Characteristic
Symbol Min
Typ¹
Max
Oscillator crystal or resonator
(EREFS = 1, ERCLKEN = 1)
• Low range (RANGE = 0)
• High range (RANGE = 1),
• FEE or FBE mode ²
f_lo
32
—
38.4
fhi
1
—
5
1
• High range (RANGE = 1),
fhi
1
—
16
• High gain (HGO = 1),
• FBELP mode
2 ^{Load capacitors}
Feedback resistor
3
• High range (RANGE = 1),
• Low power (HGO = 0),
• FBELP mode
Low range
(32 kHz to 38.4 kHz)
High range
(1 MHz to 16 MHz)
fhi
1
—
8
C₁
C₂
R_F
—
—
—
See Note ³
—
10
1
—
Series resistor — Low range
4
Low Gain (HGO = 0)
High Gain (HGO = 1)
R_S
—
0
—
—
100
—
Series resistor — High range • Low Gain (HGO = 0)
• High Gain (HGO = 1)
5
≥ 8 MHz
R_S
—
0
0
4 MHz
—
0
10
1 MHz
—
0
20
Unit
kHz
MHz
MHz
MHz
MΩ
kΩ
kΩ
Freescale Semiconductor
33
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Preliminary — Subject to Change