OSC_TRIM_RANGE_REG

Bit no.

7

6

5

4

3

2

1

0

Bit name

n/a

n/a

n/a

n/a

n/a

n/a

n/a

OSC_TRIM_RANGE_UP

Operation

n/a

n/a

n/a

n/a

n/a

n/a

n/a

R/W

Default

n/a

n/a

n/a

n/a

n/a

n/a

n/a

0

Table 10: Description of register OSC_TRIM_RANGE_REG (available from revision number 0x14)

OSC_TRIM_RANGE_UP

Defines oscillator trim range:

0: default oscillator trim range (as on chip revisions epc901_018 and epc901_019)

1: oscillator frequency increased by 25%

The bit OSC_TRIM_RANGE_UP can be regarded as an additional oscillator trim bit providing a course frequency trim step of +25%. For

fine trimming use the bits OSC_TRIM as described hereafter.

OSC_TRIM_REG

Bit no.

7

6

5

4

3

2

1

0

Bit name

n/a

n/a

n/a

n/a

OSC_TRIM

Operation

n/a

n/a

n/a

n/a

R/W

Default

n/a

n/a

n/a

n/a

0x0

Table 11: Description of register OSC_TRIM_REG

The trim range of OSC_TRIM is approx. 1.2MHz per step:

Bit no.

Trim Value (MHz)

3

2

1

0

1

0

0

0

-9.6

1

0

0

1

-8.4

1

0

1

0

-7.2

1

0

1

1

-6.0

1

1

0

0

-4.8

1

1

0

1

-3.6

1

1

1

0

-2.4

1

1

1

1

-1.2

0

0

0

0

0 (center frequency)

0

0

0

1

+1.2

0

0

1

0

+2.4

0

0

1

1

+3.6

0

1

0

0

+4.8

0

1

0

1

+6.0

0

1

1

0

+7.2

0

1

1

1

+8.4

Table 12: Oscillator trimming

© 2016 ESPROS Photonics Corporation

Characteristics subject to change without notice

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Datasheet_epc901-V5.6

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