STV8216 datasheet(52/97 Pages) STMICROELECTRONICS

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STV82x6

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ACOEFF2

Channel 2 Baseband PLL Loop Filter Proportional Coefficient

BCOEFF2

Channel 2 Baseband PLL Loop Filter Integral Coefficient &

DCO Gain

Address (hex): 33h

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ACOEFF2[7:0]

Bit Name

Reset

Function

ACOEFF2[7:0]

10010000

This value defines the loop clamping factor used to program the Proportional Coefficient of the

baseband PLL loop filter (Channel 2). See Table 15 and Table 16.

Address (hex): 34h

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

BCOEFF2[7:0]

Bit Name

Reset

Function

BCOEFF2[7:0]

10101100

This value defines the loop bandwidth used to program the Integral Coefficient of the Baseband

PLL loop filter and DCO gain. See Table 15 and Table 16.

Table 15: Baseband PLL Loop Filter Adjustments (FM Mode)

FM mode

Small

Standard

Mid

Wide

A2 standard

ACOEFF (hex)

10h

22h

2Ch

10h

BCOEFF (hex)

1Ah

12h

0Ah

11h

FM_DEV max (kHz)

62.5

125

250

500

125

DCO Range (kHz)

192

384

768

192

Table 16: Baseband PLL Loop Filter Adjustments (QPSK Mode)

QPSK mode

Small

Medium

Large

Extra-large

ACOEFF (hex)

90h

BCOEFF (hex)

ACh

A3h

9Ah

91h

DCO_DEV max (kHz)

2.84375

5.6875

11.375

22.75

STV8216 数据表(PDF) 52 Page - STMicroelectronics

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