CS47L85 datasheet(254/370 Pages) CIRRUS

254 / 370 page

CS47L85

254

Rev 4.3

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R330

(014Ah)

Output_asy

nc _lock

OPCLK_ASYNC_

ENA

OPCLK_ASYNC Enable

0 = Disabled

1 = Enabled

7:3

OPCLK_ASYNC_

DIV [4:0]

00h

OPCLK_ASYNC Divider

02h = Divide by 2

04h = Divide by 4

06h = Divide by 6

… (even numbers only)

1Eh = Divide by 30

Note that only even numbered divisions

(2, 4, 6, etc.) are valid selections.

All other codes are Reserved when the

OPCLK_ASYNC signal is enabled.

2:0

OPCLK_ASYNC_

SEL [2:0]

000

OPCLK_ASYNC Source Frequency

000 = 6.144MHz (5.6448MHz)

001 = 12.288MHz (11.2896MHz)

010 = 24.576MHz (22.5792MHz)

011 = 49.152MHz (45.1584MHz)

All other codes are Reserved

The frequencies in brackets apply for

44.1kHz-related ASYNCCLK rates only

(i.e., ASYNC_SAMPLE_RATE_n =

01XXX).

The OPCLK_ASYNC Source Frequency

must be less than or equal to the

ASYNCCLK frequency.

Table 98 OPCLK and OPCLK_ASYNC Control

PULSE WIDTH MODULATION (PWM) SIGNAL OUTPUT

GPn_FN = 048h, 049h.

The CS47L85 incorporates two Pulse Width Modulation (PWM) signal generators which can be enabled as GPIO outputs.

The duty cycle of each PWM signal can be modulated by an audio source, or can be set to a fixed value using a control

The Pulse Width Modulation (PWM) outputs may be output directly on a GPIO pin by setting the respective GPIO registers

as described in “GPIO Control”.

See “Digital Core” for details of how to configure the PWM signal generators.

SPDIF AUDIO OUTPUT

GPn_FN = 04Ch.

The CS47L85 incorporates an IEC-60958-3 compatible S/PDIF transmitter, which can be selected as a GPIO output. The

S/PDIF transmitter supports stereo audio channels, and allows full control over the S/PDIF validity bits and channel status

information.

The S/PDIF signal may be output directly on a

GPIO pin by setting the respective GPIO registers as described in “GPIO

Control

”.

See “Digital Core” for details of how to configure the S/PDIF output generator.

CS47L85 Datasheet(PDF) 254 Page - Cirrus Logic

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