CMX605(1999) 데이터 시트보기 (PDF) - MX-COM Inc

부품명

상세내역

제조사

CMX605
(Rev.:1999)

Digital Line to POTS Interface

MX-COM Inc  

Digital Line to POTS Interface

11

CMX605 Preliminary Information

4.8 ‘C-BUS’ Interface

This block provides for the transfer of data and control or status information between the CMX605’s internal

registers and the µC over the ‘C-BUS’ serial bus. Each 'C-BUS' transaction consists of a single Register

Address byte sent from the µC, as illustrated in Figure 4, which may then be followed by either of:

A single data byte sent from the µC to be written into one of the CMX605’s Write Only Registers, as

illustrated in Figure 5.

A single byte of data read out from one of the CMX605’s Read Only Registers, as illustrated in Figure 6.

Data sent from the µC on the Command Data (COMMAND DATA) line is clocked into the CMX605 on the

rising edge of the Serial Clock (SERIAL CLOCK) input. Reply Data (REPLY DATA) sent from the CMX605 to

the µC is valid when the Serial Clock is high. The interface is compatible with the most common µC serial

interfaces such as SCI, SPI and Microwire, and may also be easily implemented with general purpose µC I/O

pins controlled by a simple software routine. See Figure 9 for detailed ‘C-BUS’ timing requirements.

CS

SERIAL CLOCK

COMMAND DATA

REPLY DATA

765432 10

Address (01 Hex = Reset)

Hi-Z

Note:

The SERIAL CLOCK

line may be high or low at

the start and end of each

transaction.

= Level not important

Figure 4: ‘C-BUS’ Transactions (Single byte from µC)

CS

SERIAL CLOCK

COMMAND DATA

765432 10

Address

REPLY DATA Hi-Z

765432 10

Data to CMX605

Figure 5: ‘C-BUS’ Transactions (One Address and one Data Byte from µC)

CS

SERIAL CLOCK

COMMAND DATA

REPLY DATA

765432 10

Address

Hi-Z

765432 10

Data from CMX605

Figure 6: ‘C-BUS’ Transactions (One Address Byte from µC and one Reply Byte from CMX605)

4.9 ‘C-BUS’ Registers

Addr

$01

$D0

Register

RESET

SETUP

$D1 MODE

$D3 TX DATA

$D4 TX TONES

7

N/A

Uncommitted

Amplifier

0 = Disable

1 = Enable

SPM Output:

0 = Disable

1 = Enable

D7

D7

6

N/A

Tx Enable:

0 = Disable

1 = Enable

Command Data Byte (Bits 7 – 0)

5

4

3

N/A

N/A

N/A

DTMF Rx: SPM: Reserved

0 = Disable 0 = 12kHz set to 0

1 = Enable 1 = 16kHz

2

N/A

Reserved

set to 0

1

N/A

FSK mode:

0 = Sync

1 = Async

0

N/A

FSK mode:

0 = V23

1 = Bell 202

Tone/FSK:

0 = Disable

1 = Enable

D6

D6

Tone/FSK:

0 = Tone

1 = FSK

D5

D5

Tx Level:

(MSB)

D4

D4

Tx Level:

D3

D3

Tx Level: Tone Fields: Tone Fields:

(LSB)

(MSB)

(LSB)

D2

D1

D0

D2

D1

D0

Table 10: Write Only Registers

©1999 MX-COM, Inc.

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

Doc. # 20480195.003

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

Share Link: