EP7209 datasheet(16/128 Pages) CIRRUS

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EP7209

DS453PP2

2.2.2

SSI/Codec/DAI Pin Multiplexing

Boundary

Scan

TDI

JTAG data in

TDO

JTAG data out

TMS

JTAG mode select

TCLK

JTAG clock

nTRST

JTAG async reset

Test

nTEST[0:1]

Test mode select inputs. These pins are used in conjunction with the power-on

latched state of nURESET to select between the various device test models.

Oscillators

MOSCIN

MOSCOUT

RTCIN

RTCOUT

Main 3.6864 MHz oscillator for 18.432 MHz–73.728 MHz PLL

Real Time Clock 32.768 kHz oscillator

No connects

N/C

No connects should be left as no connects; do not connect to ground

1. All deglitched inputs are via the 16.384 kHz clock. Each deglitched signal must be held active for at least two clock periods. Therefore, the

input signal must be active for at least ~125

µs to be detected cleanly.

NOTE:

The RTC crystal must be populated for the device to function properly.

SSI2

Codec

DAI

Direction

Strength

SSICLK

PCMCLK

SCLK

I/O

SSITXFR

PCMSYNC

LRCK

I/O

SSITXDA

PCMOUT

SDOUT

Output

SSIRXDA

PCMIN

SDIN

Input

SSIRXFR

p/u*

MCLK

I/O

p/u = use an ~10 k pull-up

The selection between SSI2 and the codec is controlled by the state of the SERSEL bit in SYSCON2 (See

SYSCON2 System Control Register 2). The choice between the SSI2, codec, and the DAI is controlled by

the DAISEL bit in SYSCON3 (See SYSCON3 System Control Register 3).

Table 5. SSI/Codec/DAI Pin Multiplexing

Function

Signal

Name

Signal

Description

Table 4. External Signal Functions (cont.)

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