DM562AP datasheet(33/48 Pages) ETC1

33 / 48 page

DM562AP

V.90 Integrated Data/ Fax/Voice/Speakerphone

Modem Device Single Chip with Memory Built in

Preliminary

Version: DM562AP-DS-P02

March 05, 2004

DM6588A can not assert PME# from D0. But can

Assert PME# from D3(hot) and D3(cold). Hence the

Ring to PME# circuit must check the power state. If

ring comes at D0 power state, it can not assert PME#.

Software will enable its use by setting the PME_En bit

in the PMCSR.

It must continue to assert PME# until software either

clears the PME_En bit or clears the PME_Status bit.

Before enter D3(cold) state, host must :

1. Write 1 into PME_Status bit to clear previous

PME status

2. Write 1 into PME_En bit to enable PME

function.

3. Write 3 into Power_state

4. Power off PCI bus.

When Ring comes, Ring to PME# circuit check if

PME_EN=1 and Power_staus <>0. If yes, assert

PME# and set PME_Status=1.

When host detect PME# asserted, it will power up PCI

bus and assert RST# to initialize pci modem. At the

same time, it write 1 into PME_En bit or PME_Status

bit to stop PME#.

Before enter D3(hot) state, host must :

5. Write 1 into PME_Status bit to clear previous

PME status

6. Write 1 into PME_En bit to enable PME

function.

7. Write 3 into Power_state

When Ring come, Ring to PME# circuit check if

PME_EN=1 and Power_staus <>0. If yes, assert

PME# and set PME_Status=1.

When host detect PME# asserted, it will re-initialize

pci modem and set Power_State=0 to return D0 state.

At the same time, it write 1 into PME_En bit or

PME_Status bit to stop PME#.

PCI MODEM Board Power Management

TX DSP

Ring

Detector

DM6580

Analog

Front End

SCLK

DIT

DOT

TFS

DIR

DOR

RFS

RXSCLK

CLKIN

TXDCLK

RXDCLK

DAA

RxIN

TxA1

TxA2

Line

Speaker

Driver

RX DSP

SPKR

Microphone

Driver

30.24MHz

PCI Bus

VCC_AUX

PCI to ISA

RI to PME#

VDD : PCI +3.3V power

Vsb : auxilily +3.3V power

VDD

Power on/off

VCC_AUX

Vsb

Power

Switch

VCC = VDD if poweron

VCC = floating if power off

VDD

Micro Control

Unit

DM6588A

TXSCLK*2

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