CYW2338 datasheet(8/12 Pages) CYPRESS

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CYW2338

PRELIMINARY

Table 4. 7-Bit Swallow Counter (A) Truth Table[8]

Divide Ratio A

A7A6

A5A4A3A2

PLL1 (High Frequency)

0000

:::

126

1111

127

1111

PLL2 (Low Frequency)

0000

:::

126

1111

127

1111

Table 5. 11-Bit Programmable Counter (B) Truth Table[9]

Divide Ratio B

B11

B10

B8B7B6B5B4B3

B2B1

0000

000001

0000

000010

:::

2046

1111

111111

2047

1111

111111

Table 6. 15-Bit Programmable Reference Counter (for PLL1 and PLL2) Truth Table[9]

Divide Ratio R

R15

R14

R13

R12

R11

R10

R9R8R7R6R5R4R3R2R1

000000000000011

000000000000100

:::

32766

111111111111110

32767

111111111111111

Ordering Information[10]

Ordering Code

Package

Name

Package Type

Tape and Reel Option

CYW2338

BCI

LFI

20-pin Thin Shrink Small Outline Package (0.173” wide)

24-pin Chip Scale Package (3.5 mm X 4.5 mm)

20-pin Micro Lead Frame (4 mm x 4 mm)

Document #: 38-01004-*A

Notes:

B is greater than or equal to A.

Divide ratio less than 3 is prohibited. The divide ratio can be calculated using the following equation:

10. Operating temperature range: –40°C to +85°C.

fvco = {(P * B) + A} * fosc / R where (A < B)

fvco: Output frequency of the external VCO.

The divide ratio N = (P * B) + A.

R: Preset ratio of the 15-bit programmable reference counter (3 to 32767).

fosc: The crystal reference oscillator frequency.

A: Preset divide ratio of the 7-bit swallow counter (0 to 127).

B: Preset ratio of the 11-bit programmable counter (3 to 2047).

P: Preset divide ratio of the dual modulus prescaler (64/65 or 128/129).

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