TUSB3200CPAH datasheet(83/93 Pages) TI

83 / 93 page

A–35

A.5.4.8 CODEC Port Interface Data Register (High Byte) (CPTDATH – Address FFD9h)

The CODEC port interface data register (high byte) contains the most significant byte of the 16-bit command or status

data value used for secondary communication between the TUSB3200 MCU and the CODEC device. This register

is not used for general-purpose mode or AIC mode since these modes only support an 8-bit data value for secondary

communication.

Bit

Mnemonic

D15

D14

D13

D12

D11

D10

Type

R/W

Default

BIT

MNEMONIC

NAME

DESCRIPTION

7:0

D(15:8)

Command/status data

The command/status data value is set by the MCU with the command data to be

transmitted to the CODEC device for write transactions. The command/status data

value is updated by hardware with the status data received from the CODEC device

for read transactions.

A.5.4.9 CODEC Port Interface Valid Time Slots Register (Low Byte) (CPTVSLL – Address FFD8h)

The CODEC port interface valid time slots register (low byte) contains the control bits used to specify which time slots

in the audio frame contain valid data. This register is only used in the AC ’97 modes of operation.

Bit

Mnemonic

VTSL8

VTSL9

VTSL10

VTSL11

VTSL12

—

Type

R/W

Default

BIT

MNEMONIC

NAME

DESCRIPTION

7:3

VTSL(8:12)

Valid time slot

The valid time slot bits are set to a 1 by the MCU to define which time slots in the

audio frame contain valid data. The MCU should clear to a 0 the bits corresponding

to time slots that do not contain valid data. Note that bits 7 to 3 of this register

correspond to time slots 8 to 12.

2:0

—

Reserved

Reserved for future use

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