Z02215 Datasheet, PDF (49/74 Pages) Zilog, Inc. – Single Chip Modem with Integrated Controller, Data Pump, and Analog Front End

Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
43
Table 7. Modem S-Registers (Continued)
Register Range
S92
0–255
Default Units
0x80
S93– 0–255 –
–
S246
Description
PttBitmap (12)
Bit 0: Z02215_GPOB0, general purpose parallel output pin.
This bit allows for automatic selection of country specific
circuits in a general purpose DAA design. Set this bit to 1 to
set the PB2 signal to +5 V. Set it to 0 to set PB2 to 0V.
Bit 1: Z 02215_GPOB0, general purpose parallel output pin.
This allows for automatic selection of country specific circuits
in a general purpose DAA design. Set this to 1 to set the PB3
signal to +5 V. Set to 0 to set PB3 to 0V.
Bit 2: Z02215_USE_ACTIVEHYBRID, set this bit enables the
DSP's on chip active hybrid in all non-4 wire connections.
Bit 3: LINE_SENSE_ONLINE, set to require detection of line
current when the telephone line is off-hook.
Bit 4: DPSLEEP_DISABLE, set to1 to prevent the data pump
from being put into sleep mode when idle. Placing the data
pump in sleep mode reduces power consumption by
approximately 50 mA. Disabling sleep mode may increase the
modem's reliability, some modem designs experience
occasional problems waking after sleep.
Bit 5: MCSLEEP_DISABLE, set =1 to prevent the Z02215
from being put to sleep when idle. Placing the Z02215 in
sleep mode reduces power consumption by approximately 8
mA. Disabling sleep mode may increase the modem's
reliability, some modem designs experience occasional
problems waking after sleep. Regardless of the setting of
MCSLEEP_DISABLE, the Z02215 is not put into sleep mode
when dial blacklisting.
Bit 6: CID_V23, set =1 to use V.23 when decoding the CID
signal. Set =0 to use B202 when decoding the CID signal.
Bit 7: CID_ENABLE, set to enable the recognition of North
American Caller ID signals.
Note: The default for S92 is 0x80 (or 128 decimal), the AT
command to set the active hybrid would be: ATS92=132
These S-registers provide direct access to the country
parameters stored in RAM, and are not intended to by used
during normal operation of the modem. Refer to the #QSI
command for a description of updating the modem’s country
parameters in RAM.
PS001907-0904
Modem S-Registers