CMX813 View Datasheet(PDF) - MX-COM Inc

Part Name

Description

Manufacturer

CMX813

Multi-standart analog paging decoder

MX-COM Inc  

CMX813 Multi-Standard Analog Paging Decoder

6

5. Software Description

CMX813 Advance Information

5.1 Address/Commands

Instructions and data are transferred, via C-BUS, in accordance with the timing information provided in

Figure 3.

Instruction and data transactions to and from the CMX813 consist of an Address/Command (A/C) byte, which

may be followed by either:

(i)

a further instruction or data (1 byte) or

(ii) a status or Rx data reply (1 byte)

5.1.1 8-bit Write Only Registers

HEX

ADDRESS/

COMMAND

$01

REGISTER

NAME

GENERAL

RESET

$30

CONTROL

$31

TONE

ADDRESS

BIT 7

(D7)

BIT 6

(D6)

N/A

N/A

ROM PAGE SELECT

MSB

LSB

BIT 7

BIT 6

MSB

BIT 7

BIT6

BIT 5

(D5)

BIT 4

(D4)

BIT 3

(D3)

BIT 2

(D2)

N/A

N/A

N/A

N/A

DECODER BANDWIDTH

MSB

LSB

BIT 5 BIT 4 BIT 3 BIT 2

TONE ADDRESS

BIT 5 BIT 4 BIT 3 BIT 2

BIT 1

(D1)

BIT 0

(D0)

N/A

N/A

OPERATION MODE

MSB

LSB

BIT 1

BIT 0

BIT 1

LSB

BIT 0

5.1.2 Write Only Register Description

5.1.2.1 GENERAL RESET (Hex address $01)

The reset command has no data attached to it. It sets the device (write) registers to zero and enters the Zero

Power mode. And all RAM contents and RAM FULL bit of the STATUS Register are reset to 0.

5.1.2.2 CONTROL Register (Hex address $30)

This register is used to control the functions of the device as described below:

ROM PAGE SELECT

(Bits 7 and 6)

DECODER BANDWIDTH

(Bits 5, 4, 3 and 2)

OPERATION MODE

(Bits 1 and 0)

These two bits select the section of the ROM where pre-programmed tone

data are stored for detection. The ROM area is divided into three sections

(pages). The 1 tone or 2 tone system tones are stored in ROM Page 1 and 2.

The 5/6 tone and HSC tones are stored in ROM Page 3.

These four bits set the bandwidth of the tone decoder according to table

below:

These two bits select the mode of operation of the device.

Bit 7

0

0

1

1

Bit 6

0

1

0

1

ROM PAGE

No ROM PAGE selected, a valid but unrecognized tone may be detected,

no interrupt generated

ROM Page 1 selected, for 1 tone or 2 tone system

ROM Page 2 selected, for 1 tone or 2 tone system

ROM Page 3 selected, for 5/6 tone or HSC tone system

Table 3: ROM PAGE SELECT (Bits 7 and 6)

¤2000 MX-COM, Inc.

www.mxcom.com tel: 336 744 5050 800 638 5577 fax: 336 744 5054

Doc. # 20480220.002

4800 Bethania Station Road, Winston-Salem, NC 27105-1201, USA All trademarks and service marks are held by their respective customers.

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