Справочник Пользователя для Motorola MC68HC908MR16

Motorola

Advance Information

MC68HC908MR16/MC68HC908MR32 — Rev. 4.0

376

Electrical Specifications

MOTOROLA

Electrical Specifications

22.10 TImer Interface Module Characteristics

22.11 Clock Generation Module Component Specifications

22.12 CGM Operating Conditions

Characteristic

Symbol

Min

Max

Unit

Input capture pulse width

t

TIH,

t

TIL

125

—

ns

Input clock pulse width

t

TCH,

t

TCL

(1/f

OP

) + 5

—

ns

Characteristic

Symbol

Min

Typ

Max

Notes

Crystal load capacitance

C

L

—

—

—

Consult crystal

manufacturing data

Crystal fixed capacitance

C

1

—

2 * C

L

—

Consult crystal

manufacturing data

Crystal tuning capacitance

C

2

—

2 * C

L

—

Consult crystal

manufacturing data

Feedback bias resistor

R

B

—

22 M

Ω

—

Series resistor

R

S

0

330 k

Ω

1 M

Ω

Not required

Filter capacitor

C

F

—

C

FACT

*

(V

DDA

/f

XCLK

)

—

Bypass capacitor

C

BYP

—

0.1

µ

F

—

C

BYP

must provide low ac

impedance from

f = f

XCLK

/100 to 100*f

VCLK

,

so series resistance must

be considered

Characteristic

Symbol

Min

Typ

Max

Unit

Crystal reference frequency

f

XCLK

1

—

8

MHz

Range nominal multiplier

f

NOM

—

4.9152

—

MHz

VCO center-of-range frequency

f

VRS

4.9152

—

32.8

MHz

VCO frequency multiplier

N

1

—

15

—

VCO center of range multiplier

L

1

—

15

—

VCO operating frequency

f

VCLK

f

VRSMIN

—

f

VRSMAX

—