HCS08 datasheet(274/290 Pages) MOTOROLA

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Electrical Characteristics

MC9S08GB/GT

274

MOTOROLA

A.8.1 ICG Frequency Specifications

Table A-9 ICG Frequency Speciﬁcations

(VDDA = VDDA (min) to VDDA (max), Temperature Range = –40 to 85°C Ambient)

Characteristic

Symbol

Min

Typical

Max

Unit

Oscillator crystal or resonator (REFS = 1)

(Fundamental mode crystal or ceramic resonator)

Low range

High range, FLL bypassed external (CLKS = 10)

High range, FLL engaged external (CLKS = 11)

flo

fhi_byp

fhi_eng

—

100

kHz

MHz

Input clock frequency (CLKS = 11, REFS = 0)

Low range

High range

flo

fhi_eng

—

100

kHz

MHz

Input clock frequency (CLKS = 10, REFS = 0)

fExtal

—

MHz

Internal reference frequency (untrimmed)

fICGIRCLK

182.25

243

303.75

kHz

Duty cycle of input clock (REFS = 0)

tdc

—

Output clock ICGOUT frequency

CLKS = 10, REFS = 0

All other cases

fICGOUT

fExtal (min)

flo (min)

fExtal (max)

fICGDCLKmax

(max)

MHz

Minimum DCO clock (ICGDCLK) frequency

fICGDCLKmin

—

MHz

Maximum DCO clock (ICGDCLK) frequency

fICGDCLKmax

—

MHz

Self-clock mode (ICGOUT) frequency (1)

NOTES:

1. Self-clocked mode frequency is the frequency that the DCO generates when the FLL is open-loop.

fSelf

fICGDCLKmin

fICGDCLKmax

MHz

Self-clock mode reset (ICGOUT) frequency

fSelf_reset

5.5

10.5

MHz

Loss of reference frequency(2)

Low range

High range

2. Loss of reference frequency is the reference frequency detected internally, which transitions the ICG into

self-clocked mode if it is not in the desired range.

fLOR

500

kHz

Loss of DCO frequency(3)

fLOD

0.5

1.5

MHz

Crystal start-up time (4), (5)

Low range

High range

tCSTL

tCSTH

—

430

—

FLL lock time (6)

Low range

High range

tLockl

tLockh

—

FLL frequency unlock range

nUnlock

–4*N

4*N

counts

FLL frequency lock range

nLock

–2*N

2*N

counts

ICGOUT period jitter, (7) measured at fICGOUT Max

Long term jitter (averaged over 2 ms interval)

CJitter

—

0.2

% fICG

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