DM385 datasheet(164/281 Pages) TI

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ATL_CLKOUTx

DM385, DM388

SPRS821D – MARCH 2013 – REVISED DECEMBER 2013

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8.3

Audio Tracking Logic (ATL)

8.3.1

Overview

The device contains four ATL modules that can be used for asynchronous sample rate conversion of

audio. The ATL calculates the error between two time bases, such as audio syncs, and optionally

generates an averaged clock using cycle stealing via software.

For more detailed information on the ATL peripheral, see the Audio Tracking Logic (ATL) chapter of the

device-specific Technical Reference Manual.

8.3.2

ATL Peripheral Registers

This ATL peripheral registers are described in the device-specific Technical Reference Manual (TRM).

Each register is documented as an offset from a base address for the peripheral. The base addresses for

all of the peripherals are in the device memory map (see Section 2.10).

8.3.3

ATL Electrical Data/Timing

Table 8-1. Switching Characteristics Over Recommended Operating Conditions for ATL_CLKOUTx

OPP100/OPP120/

Turbo/Nitro

NO.

PARAMETER

UNIT

MIN

MAX

tc(ATLCLKOUT)

Cycle time, ATL_CLKOUTx

tw(ATLCLKOUTL)

Pulse Duration, ATL_CLKOUTx low

0.45*P - M(1)

tw(ATLCLKOUTH)

Pulse Duration, ATL_CLKOUTx high

0.45*P - M(1)

(1)

P = ATL_CLKOUTx period.

M = internal ATL PCLK period.

Figure 8-4. ATL_CLKOUTx Timing

164

Peripheral Information and Timings

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