Z0221500ZCO Zilog, Z0221500ZCO Datasheet - Page 68

• 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
Register Range
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0–255
Reserved
Reserved
0–255
Default Units
5
0
Table 5. Modem S-Registers (Continued)
Seconds
or 1/100
sec
Minutes
PRELIMINARY
Description
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
DTR detection. During SYNCHRONOUS oper-
ation with the &Q1 command in effect, S-register
S25 specifies the number of seconds after a tele-
phone line connection is made before the modem
examines DTR. This delay allows sufficient time
to disconnect the modem from an ASYNCHRO-
NOUS terminal and attach the modem to a
SYNCHRONOUS terminal.
In the ON-LINE or COMMAND state during any
mode of operation, DTR changes are ignored for
the period of time specified by the value ( S25–1 )
to S25 in hundreths of a second.
Reserved
Reserved
Terminal inactivity time-out. Hangs up the
modem after the number of minutes specified in
S28 if no characters are received from the
modem’s terminal.
Evaluation Board User Manual
Z02215 Single-Chip Modem
UM002304-0802
62