Z02205 Datasheet, PDF (20/30 Pages) Zilog, Inc. – MODEM CONTROLLER IDEAL FOR LOW POWER CONSUMPTION, SMALL SIZE REQUIREMENTS

Z02205
Modem Controller
ZiLOG
MODEM S-REGISTERS
The value of an S-register is modified by ATSn = x, where
n is the register number and x is the value to be stored in
that particular register. Each S-register has three values that
may be configured for different countries: a default value,
an upper limit, and a lower limit. The values shown in this
manual are for North America.
Table 4. Modem S-Registers
Register Range
S0
0–255
S1
0–255
S2
0–255
S3
0–127
S4
0–127
S5
0–127
S6
2–255
S7
1–255
S8
0–255
S9
1–255
S10
1–255
S11
50–255
S12
0–255
S13
Reserved
S14
Reserved
S15
Reserved
S16
Reserved
S17
–6 to –43
S18
Reserved
S19
Reserved
S20
Reserved
Units
Rings
Rings
ASCII
ASCII
ASCII
ASCII
Seconds
Seconds
Seconds
1/10th sec
1/10th sec
msec
1/50th sec
Reserved
Reserved
Reserved
Reserved
–dBm
Reserved
Reserved
Reserved
Description
Sets number of rings to auto-answer. The country configuration may disable the modem’s
ability to detect a telephone line ring signal. In this case, the modem will never
automatically answer the telephone regardless of the S0 setting. Default = 0 (auto-answer
disabled)
Returns the number of times the phone rings. Default = 0
Sets Escape Sequence Character. Setting S2 to a value greater than 127 disables the
character escape sequence, preventing the modem from returning to Command state
when in the On-Line state. Default = 43
Sets the End of Line character. Default = 13
Sets the Line Feed Character. Default = 10
Sets the BackSpace Character. Default = 8
Delays to Wait Before Performing a Blind Dial. Default = 2 seconds
Delays to Wait for Carrier after dialing. Default = 30 seconds
Delays to Wait when a Comma Dial Modifier is Processed. Default = 2 sec.
Time Carrier Must be Present Before Being Recognized. Default = 0.6 sec.
Delay Between Lost Carrier and Hang Up. Setting S-register S10 to 255 prevents the
modem hanging up the telephone line because of a loss of carrier. Default = 14 tenths of a
second
Multi-Frequency Tone duration. Default = 95 milliseconds
Escapes Prompt delay time. This is the prompt delay time for escape sequences from the
On-Line state to the Command state. Default = 50 fiftieths of a second
Reserved
Reserved
Reserved
Reserved
Sets Transmit level. Default = –10 dBm
Reserved
Reserved
Reserved
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PS001000-MOD0599