CY28SRC02

Rev 1.0, November 20, 2006

Page 5 of 9

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Crystal Recommendations

The CY28SRC02 requires a Parallel Resonance Crystal.

Substituting a series resonance crystal will cause the

CY28SRC02 to operate at the wrong frequency and violate the

ppm specification. For most applications there is a 300-ppm

frequency shift between series and parallel crystals due to

incorrect loading.

1

0

Reserved

Reserved

0

1

Reserved

Reserved

Byte 4: Control Register 4 (continued)

Bit

@Pup

Name

Description

Byte 5: Control Register 5

Bit

@Pup

Name

Description

7

0

Reserved

Reserved

6

0

Reserved

Reserved

5

0

Reserved

Reserved

4

0

Reserved

Reserved

3

0

Reserved

Reserved

2

0

Reserved

Reserved

1

0

Reserved

Reserved

0

0

Reserved

Reserved

Byte 6: Control Register 6

Bit

@Pup

Name

Description

7

0

TEST_SEL

REF/N or Tri-state Select

1 = REF/N Clock, 0 = Tri-state

6

0

TEST_MODE

Test Clock Mode Entry Control

1 = REF/N or Tri-state mode, 0 = Normal operation

5

0

Reserved

Reserved

4

1

Reserved

Reserved

3

0

Reserved

Reserved

2

0

Reserved

Reserved

1

1

Reserved

Reserved

0

1

Reserved

Reserved

Byte 7: Control Register 7

Bit

@Pup

Name

Description

7

0

Revision Code Bit 3

6

0

Revision Code Bit 2

5

1

Revision Code Bit 1

4

1

Revision Code Bit 0

3

1

Vendor ID Bit 3

2

0

Vendor ID Bit 2

1

0

Vendor ID Bit 1

0

0

Vendor ID Bit 0

Table 4. Crystal Recommendations

Frequency

(Fund)

Cut

Loading

Load Cap

Drive

(max.)

Shunt Cap

(max.)

Tolerance

(max.)

Stability

(max.)

Aging

(max.)

14.31818 MHz

AT

Parallel

12pF - 16pF

1 mW

7 pF

+ 50ppm

+ 50ppm

5 ppm