HE84G762B datasheet(33/60 Pages) KB

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KING BILLION ELECTRONICS CO., LTD

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HE84G762B

HE80004 Series

June 1, 2004

V0.92

This specification is subject to change without notice. Please contact sales person for the latest version before use.

110

111

The following table shows the combinations of R and C, and the resulting frequency. Please note that

oscillation frequency in the table only represents oscillation frequencies of certain samples. The actual

oscillation frequency may vary up to ±15% from lot to lot due to process parameter variations. User must

take this into consideration when using this chip in applications.

Ring Oscillator Frequency Table

30.20

0.8

1.5

2.0

3.0

4.0

5.0 MHz

19.92

1.2

2.2

2.8

4.4

5.6

7.0 MHz

9.98

2.3

4.0

5.1

7.5

9.4

11.4 MHz

Two types of oscillator, crystal and RC, can be used as slow clock selectable by mask option

MO_SXTAL. If used time keeping function or other applications that required the accurate timing, crystal

oscillator is recommended. If the timing accuracy is not important, then RC type oscillator can be used to

reduce cost.

MO_SXTAL

Slow clock type

R/C oscillator

Crystal oscillator

SXI

SXO

Crystal Osc.

RC Osc.

With two clock sources available, the system can switch among operation modes of Normal, Slow, Idle,

and Sleep modes by the setting of OP1 and OP2 registers as shown in tables below to suit the needs of

application such as high speed or low power, etc.

OP1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Field

DRDY

STOP

SLOW

INTE

T2E

T1E

Mode

R/W

Reset

OP2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Field

IDLE

PNWK

TCWK

TBE

TBS[3..0]

Mode

R/W

C (pF)

R (KΩ)

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