MC9S08QB4 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MC9S08QB4' PDF : 36 Pages View PDF
Electrical Characteristics
1 Data in Typical column was characterized at 3.0 V, 25 °C or is typical recommended value.
2 Load capacitors (C1,C2), feedback resistor (RF) and series resistor (RS) are incorporated internally when RANGE = HGO = 0.
3 See crystal or resonator manufacturer’s recommendation.
4 Proper PC board layout procedures must be followed to achieve specifications.
EXTAL
XOSCVLP
RF
XTAL
RS
Crystal or Resonator
C1
C2
Figure 10. Typical Crystal or Resonator Circuit: High Range and Low Range/High Gain
EXTAL
XOSCVLP
XTAL
Crystal or Resonator
Figure 11. Typical Crystal or Resonator Circuit: Low Range/Low Power
3.9 Internal Clock Source (ICS) Characteristics
Table 11. ICS Frequency Specifications (Temperature Range = –40 to 85°C Ambient)
Num C
Characteristic
Symbol Min. Typical1 Max. Unit
1
P
Average internal reference frequency — factory trimmed
at VDD = 3.6 V and temperature = 25 °C
2 P Internal reference frequency — user trimmed
fint_t
fint_ut
— 32.768 — kHz
31.25
—
39.06 kHz
3 T Internal reference start-up time
tIRST
—
60
100 μs
4
P
DCO output frequency range — Low range (DRS = 00)
trimmed2
fdco_t
16
—
20 MHz
5 P DCO output frequency2
Reference = 32768 Hz and DMX32 = 1
fdco_DMX32
—
19.92
— MHz
6
C
Resolution of trimmed DCO output frequency at fixed voltage
and temperature (using FTRIM)
Δfdco_res_t
—
±0.1
±0.2 %fdco
MC9S08QB8 Series MCU Data Sheet, Rev. 3
16
Freescale Semiconductor
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