CMX868E2 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX868E2' PDF : 43 Pages View PDF
Low Power V.22bis Modem
17
CMX868 Advance Information
4.10.1 General Reset Command (no data) C-BUS address $01
This command resets the device and clears all bits of the General Control, Transmit Mode and Receive Mode
Registers and bits 15 and 13-0 of the Status Register.
Whenever power is applied to the CMX868 a General Reset command should be sent to the device, after
which the General Control Register should be set as required.
A) Single byte from µC
CS
SERIAL CLOCK
COMMAND DATA
765432 10
REPLY DATA
Address (01 Hex = Reset)
Hi-Z
b) One Address and one Data byte from µC
CS
SERIAL CLOCK
COMMAND DATA
765432 10
Address
REPLY DATA
Hi-Z
Note:
The SERIAL CLOCK line may be high
or low at the start and end of each
transaction. See Figure 24.
= Level not important
765432 10
Data to CMX868
c) One Address and 2 Data bytes from µC
CS
SERIAL CLOCK
COMMAND DATA
765432 10
Address
REPLY DATA
Hi-Z
765432 10
First (msb) data
byte to CMX868
765432 10
Second (lsb) data
byte to CMX868
d) One Address byte from µC and one Reply byte from CMX868
CS
SERIAL CLOCK
COMMAND DATA
765432 10
Address
REPLY DATA
Hi-Z
765432 10
Data from CMX868
e) One Address byte from µC and 2 Reply bytes from CMX868
CS
SERIAL CLOCK
COMMAND DATA
765432 10
Address
REPLY DATA
Hi-Z
765432 10
First (msb) byte
from CMX868
765432 10
Second(lsb) byte
from CMX868
Figure 16: C-BUS Transactions
¤2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480205.007
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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