MC9S08QB8 Datasheet, PDF (16/36 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit

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
R_F
XTAL
R_S
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 V_DD = 3.6 V and temperature = 25 °C
2 P Internal reference frequency — user trimmed
f_{int_t}
f_{int_ut}
— 32.768 — kHz
31.25
—
39.06 kHz
3 T Internal reference start-up time
t_IRST
—
60
100 μs
4
P
DCO output frequency range — Low range (DRS = 00)
trimmed²
f_{dco_t}
16
—
20 MHz
5 P ^{DCO output frequency2}
Reference = 32768 Hz and DMX32 = 1
f_{dco_DMX32}
—
19.92
— MHz
6
C
Resolution of trimmed DCO output frequency at fixed voltage
and temperature (using FTRIM)
Δf_{dco_res_t}
—
±0.1
±0.2 %f_dco
MC9S08QB8 Series MCU Data Sheet, Rev. 3
16
Freescale Semiconductor