Z0221500ZCO Zilog, Z0221500ZCO Datasheet - Page 41

• 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
B
(Continued)
Communication
Standard
Option
Function and Description
B4
B5
PRELIMINARY
The Minitel compatibility mode is activated by this
command. It defaults to Master mode if the modem is
the originator.
The modem transmits at 75 bps and receives at 1200
bps. If S-register S37 is 1 , Minitel line reversals are
supported. Minitel allows a modem using V.23 and
transmitting at 75 bps to simultaneously switch its
transmitter to 1200 bps and receiver to 75 bps. The
other V.23 Minitel modem is expected to detect the
change and switches its transmitter to 75 bps and
receiver to 1200 bps. The \R and R commands
describe methods of causing a Minitel line reversal
during a V.23 connection.
If S-register S37 is set to any value other than 1 , then
a setting of B4 operates as if B0 is set.
If S-register S37 is 1 (V.23) or 2 (Bell 202), the
modem assumes it has a 4-wire telephone connection.
Both the transmitter and receiver will use the High
(1200 bps) telephone-line data rate. This will not
operate properly unless the modem has a 4-wire tele-
phone connection.
If S-register S37 is set to any value other than 1 or 2 ,
then a setting of B5 operates as if B0 is set.
Evaluation Board User Manual
Z02215 Single-Chip Modem
UM002304-0802
35