Host Accelerated Modem 56K V.92 Chipset — 536EPXX
Preliminary Datasheet
Intel Confidential
29
Important:
A minimum recovery time of 200µs from D2 to D0 is required before the next function can be
accessed. Attempted access sooner than this could result in undefined system behavior.
8.3.3
D3
cold
Switching from main supply outputs to the auxiliary power source requires strict power budgeting
of slots, determining those to consume full 3.3V
aux
power. A PCI function must draw no more than
20 mA through the 3.3V
aux
pin when in D3
cold
if the PME_En bit is cleared. If a PCI function has
been enabled for PME# generation before entering D3
cold
, the PCI add-in card can continue to
draw up to 375 mA through the 3.3V
aux
pin while in D3
cold
.
8.3.4
Speaker Interface
The AFE device internally implements both the volume control and amplifier necessary to drive an
external speaker. The output of the internal amplifier can be connected directly to a speaker or to
the input of the host speaker amplifier. The internal amplifier is capable of driving a maximum load
of 40
Ω.
The speaker volume is controlled by the ATLn command.
8.3.5
Microphone Interface
The MD1724 AFE device provides a microphone interface that connects a microphone or handset
to the modem with a minimum of external parts. This microphone input can then be used for local
Voice record mode or for Telephone-Emulation mode.
8.3.6
General-Purpose I/O Interface
To customize the modem design, the DSP
provides 14 general-purpose pins that can be used to
control or monitor external circuitry.
Some of the general-purpose pins can be configured for specific functions (such as a Caller ID
relay, CIDREL*). Pin functions can be controlled via the host controller code. Some Voice mode
functions are enhanced by adding external circuitry for remote hang-up detection, extension phone
pickup, or hang-up detection.
