S9S08QD4CSC View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

S9S08QD4CSC

8-BIT HCS08 Microcontrollers

Freescale Semiconductor 

Appendix A Electrical Characteristics

A.7 Internal Clock Source Characteristics

Table A-7. Internal Clock Source Specifications

Characteristic

Symbol

Min

Typ1

Max Unit

Average internal reference frequency - untrimmed

Average internal reference frequency - trimmed

DCO output frequency range - untrimmed

DCO output frequency range - trimmed

Resolution of trimmed DCO output frequency at fixed voltage and

temperature (Consumer and Industrial MC9S08QDx)2

fint_ut

fint_t

fdco_ut

fdco_t

25

31.25 41.66 kHz

—

31.25

—

kHz

12.8

16

21.33 MHz

—

16

—

MHz

—

—

± 0.2

Resolution of trimmed DCO output frequency at fixed voltage and

Δfdco_res_t

temperature (Automotive S9S08QDx)2

—

–40°C to 0°C

0 to 125°C

%fdco

—

± 0.3

± 0.2

Total deviation of trimmed DCO output frequency over voltage and

temperature 2

Consumer and Industrial MC9S08QDx

Δfdco_t

—

—

±2

%fdco

Automotive S9S08QDx

±3

FLL acquisition time 2,3

tacquire

1

ms

Long term Jitter of DCO output clock (averaged over 2 ms interval) 4

CJitter

—

—

0.6

%fdco

1 Data in Typical column was characterized at 3.0 V and 3.0 V, 25°C or is typical recommended value.

2 Characterized, but not tested.

3 This specification applies to any time the FLL reference source or reference divider is changed, trim value changed or changing

from FLL disabled (FBELP, FBILP) to FLL enabled (FEI, FEE, FBE, FBI). 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 VDD and VSS and variation in crystal oscillator frequency increase the CJitter percentage for

a given interval.

MC9S08QD4 Series MCU Data Sheet, Rev. 6

184

Freescale Semiconductor

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