MFC2000 datasheet(366/426 Pages) ETC

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MFC2000 Multifunctional Peripheral Controller 2000

Hardware Description

20-8

Conexant

100723A

The frequency of the tone generators can be set according to the following formula:

ToneFrequency

AUXCLK

ToneGenValue

() * * *

88 2

Note:

ToneGenValue is the value in ALTToneGen or ToneGen Freq1 and Freq2 registers.

When ToneGenValue is zero, then the tone generator is disabled, and the output is low.

20.3.2 Registers Description

Address:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

ALTToneGen

01FF80B3

(Not Used)

ALTTone Frequency

Rst. Value

xxxxxx00b

Read Value

00h

Address:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

ALTToneGen

01FF80B2

ALTTone Frequency Register

Rst. Value

00h

Read Value

00h

Bit 9-0:

ALTTone frequency

Note:

When ALTToneGen = 0, then ALTTone is disabled and the ALTTone output to pin is 0.

Address:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

ToneGenF1

01FF80B1

(Not Used)

Tone Frequency 1

Rst. Value

xxxxxx00b

Read Value

00h

Address:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

ToneGenF1

01FF80B0

Tone Frequency 1 Register

Rst. Value

00h

Read Value

00h

Bit 9-0:

Tone frequency 1

Note:

When Tone = 0, then tone is disabled and the tone output to pin is 0.

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