MX803ALH Ver la hoja de datos (PDF) - MX-COM Inc

Número de pieza

componentes Descripción

Fabricante

MX803ALH

Audio Signaling Processor

MX-COM Inc  

Audio Signaling Processor

20

MX803A PRELIMINARY INFORMATION

5.6 General Reset

Upon power-up the bits in the MX803A registers will be random (either “0” or “1”). A General Reset Command (01H) will

be required to reset all microcircuits on the C-BUS. It has the following effect on the MX803A:

Control Register

Status Register (bits 0, 1, 2)

Notone Timer

Tone Gen. 1 Reg. (2 bytes)

Tone Gen. 2 Reg. (2 bytes)

Gen. Purpose Reg.

Set as 00H

Set as 00H

Set as 00H

Set as 0000H

Set as 0000H

Set as 00H

Table 10: General Reset effect on MX803A

This sets the MX803A to Encoder High Band (625Hz to 3000Hz) with interrupts disabled and both timers set to 00H.

Both timers should be set up before interrupts are enabled to prevent initial, undesired interrupts.

6. Timing Information

Figure 8 shows timing parameters for two-way communication between the µC and the MX803A on the C-BUS.

CHIP SELECT

tCSOFF

tNXT

SERIAL CLOCK

COMMAND DATA

76543210

MSB

LSB

ADDRESS/COMMAND

BYTE

REPLY DATA

Logic level is not important

tNXT

tNXT

tCK

76543210

FIRST DATA BYTE

76543210

MSB

LSB

FIRST REPLY DATA BYTE

76 54 32 10

LAST DATA BYTE

765432 1 0

LAST REPLY DATA BYTE

tCSE

tHIZ

Figure 8: C-BUS Timing

© 1996 MX•COM, INC.

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

Doc. # 20480122.003

Share Link: