STAC9708 datasheet(32/56 Pages) ETC

32 / 56 page

SigmaTel, Inc.

Preliminary

STAC9708/11

10/02/98

Table 18. Multi-Channel Programming Register

MC1, MC0

PCM OUT

LEFT

PCM OUT

RIGHT

PCM2

LEFT

PCM2

RIGHT

0, 0

Slot 3

Slot 4

Slot 7

Slot 8

0, 1

Slot 7

Slot 8

Slot 6

Slot 9

1, 0

Slot 6

Slot 9

Slot 7

Slot 8

1, 1

Slot 6

Slot 9

Slot 10

Slot 11

4.4.10 Powerdown Control/Status Register (Index 26h)

This read/write register is used to program powerdown states and monitor subsystem readiness. The

lower half of this register is read only status, a “1” indicating that the subsection is “ready”. Ready is

defined as the subsection’s ability to perform in its nominal state. When this register is written, the bit

values that come in on AC-Link will have no effect on read only bits 0-7. Bit 15,

When the AC-Link “Codec Ready” indicator bit (SDATA_IN slot 0, bit 15) is a 1, it indicates that the

AC-Link and AC'97 control and status registers are in a fully operational state. The AC'97 controller

must further probe this Powerdown Control/Status Register to determine exactly which subsections, if

any are ready.

Table 19. Powerdown Status Registers

BIT

FUNCTION

EAPD

External Amplifier Power Down

REF

VREF’s up to nominal level

ANL

Analog mixers, etc. ready

DAC

DAC section ready to playback data

ADC

ADC section ready to playback data

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