Baseband Signal Processor

7

MX829 PRELIMINARY INFORMATION

© 1998 MX

•COM Inc.

www.mxcom.com Tele: 800 638-5577 336 744-5050

Fax: 336 744-5054

Doc. # 20480160.004

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5. Software Description

5.1 Address/Commands

Instructions and data are transferred, via "C-BUS", in accordance with the timing information given in Figure 14.

Instruction and data transactions to and from the MX829 consist of an Address/Command (A/C) byte followed by either:

1.

a further instruction or data (1 or 2 bytes)

2.

a status or Rx data reply (1 byte)

5.1.1 8-bit Write Only Registers

HEX

ADDRESS/

COMMAND

REGISTER

NAME

BIT 7

(D7)

BIT 6

(D6)

BIT 5

(D5)

BIT 4

(D4)

BIT 3

(D3)

BIT 2

(D2)

BIT 1

(D1)

BIT 0

(D0)

$01

RESET

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

$10

CONTROL 1

AMP1

AMP2

AUDIO

MSKRX

MSKTX

UK/F

MIC

B/W

$11

CONTROL 2

CHKSUM

DTMFEN

DTMFHI

DTMFLO

DTMF3

DTMF2

DTMF1

DTMF0

$13

AUDIO

<-------------------------- GAIN -------------------------->

ATTENUATION

0

0

0

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

$40

CONTROL 3/

IRQ ENABLE

0

1200/2400

TXIDLEM RXDATAM TXDATAM RX SYNC

WORD

PRIME

SYNT

PRIME

SYNC

PRIME

$43

TXDATA

<----------------------------------------------- TXDATA ----------------------------------------------->

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

5.1.2 16-bit Write Only Registers

HEX

ADDRESS/

COMMAND

REGISTER

NAME

BIT 7

(D7)

BIT 6

(D6)

BIT 5

(D5)

BIT 4

(D4)

BIT 3

(D3)

BIT 2

(D2)

BIT 1

(D1)

BIT 0

(D0)

$12

MOD LEVELS

MOD 1

<-------------------------- MOD 1 -------------------------->

(1)

0

0

ENABLE

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

<-------------------------- MOD 2 -------------------------->

(2)

0

0

0

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

$44

RX SYNC

<------------------------------------------- RX SYNC WORD ----------------------------------------->

WORD (1)

BIT 15

BIT 14

BIT 13

BIT 12

BIT 11

BIT 10

BIT 9

BIT 8

<------------------------------------------- RX SYNC WORD ----------------------------------------->

(2)

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0