Z0221500ZCO Zilog, Z0221500ZCO Datasheet - Page 55

• Manufacturer Part Number: Z0221500ZCO
• Description: Z02215 ONE-CHIP MODEM EVAL KIT
• Manufacturer: Zilog

Specifications of Z0221500ZCO

• Main Purpose: Telecom, Modem
• Utilized Ic / Part: Z02215
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Using The AT Command Set
Mnemonic Name
R
Minitel Line
Reversal
Command
Function and Description
\Q4
If the modem is in the IDLE state, the R command configures the
modem to enter STATIC REVERSE mode when a Minitel
connection is made. If the modem has a connection and is in
Minitel master mode, issuing the R command performs a Direct
turnaround. If the reversal is successful then the modem will
return OK otherwise it returns NO CARRIER. If modem is not in
master mode, ERROR is returned.
When this command is issued to the terminal transmitting at 75
bps during Minitel V.23 operation ( B4 and S37 are 1 ), the
transmit data rate changes to 1200 bps, and the receive data rate
changes to 75 bps. If the other modem supports and is configured
for Minitel operation with line reversals, the modem automati-
cally detects the rate switch and changes its own transmit and
receive data rates.
Note: R may be followed by the O command in the command line
to immediately return the modem to ON-LINE mode.
PRELIMINARY
This option enables Unidirectional DCE-to-DTE
XON/XOFF flow control. In this mode, the modem
sends an XOFF character to instruct the terminal to
stop sending data to the modem. The modem sends an
XON character to instruct the terminal to resume
sending data. The modem treats XON and XOFF char-
acters sent from the terminal to the modem as data
characters.
Evaluation Board User Manual
Z02215 Single-Chip Modem
UM002304-0802
49