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MX803AJ

Audio Signaling Processor

MX-COM Inc  

Audio Signaling Processor

9

MX803A PRELIMINARY INFORMATION

5.2 Address/Commands

The first byte of a loaded data sequence is always recognized by the C-BUS as an Address/Command (A/C) byte.

Instruction and data transactions to and from this device consist of an A/C byte followed by further instruction/data or a

status/data reply.

Instructions and data are loaded and transferred via C-BUS in accordance with the timing information given in Figure 8

and Figure 9. Table 1 shows the list of A/C bytes relevant to the MX803A.

Command Assignment

General Reset

Write to Control Register

Read Status Register

Read RX Tone Frequency

Write to Notone Timer

Write to TX Tone Gen. 1

Write to TX Tone Gen. 2

Write to G/Purpose Timer

Address/Command (A/C) Byte Data Bytes

Hex

Binary

msb

lsb

01

00000001

30

00110000 + 1 byte instruction to Control Register

31

00110001 + 1 byte reply from Status Register

32

00110010 + 2 bytes reply from RX Tone Register

33

00110011 + 1 byte instruction to Notone Register

34

00110100 + 2 bytes instruction to TX Tone Gen. 1

35

00110101 + 2 bytes instruction to TX Tone Gen. 2

36

00110110 + 1 byte instruction to G/Purpose Timer

Table 1: C-BUS Address/Commands

0

1000

2000

3000

4000

(TX) Tone Generators 1 and 2

208Hz to 3000Hz

1250Hz to 6000Hz

(RX) High Band

(RX) Extended Band

625Hz to 3000Hz

(RX) Mid Band 313Hz to 1500Hz

0

1000

2000

3000

4000

5000

6000

5000

6000

Frequency (Hz)

Figure 4: MX803A Frequencies

© 1996 MX•COM, INC.

Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054

Doc. # 20480122.003

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