CS5535 datasheet(543/555 Pages) NSC

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Electrical Specifications (Continued)

6.3.8

AC97 Codec Signals

The signals detailed in this sub-section use a “Q7” buffer

type. For a detailed explanation of buffer types, see Table

2-4 "Buffer Type Characteristics" on page 28.

In this subsection, unless otherwise noted:

• All timing specifications are specified under the oper-

ating conditions listed in Table 6-3 on page 526 (i.e.,

VCORE and VCORE_VSB = All; VIO and VIO_VSB = All;

TCASE = All).

• Signals are referenced to AC_CLK low-to-high edge.

• Signal parameters are defined in Figure 6-2 "AC Refer-

ence Timing and Test Definition" on page 530.

Table 6-16. AC97 Codec Timing Parameters

Signal

Parameter

Min

Max

Units

Comment/Condition

AC_S_OUT,

AC_S_SYNC

tVAL

Note 1.

AC_S_IN,

AC_S_IN2 (GPIO12)

tSETUP

Note 2 and Note 3.

tHOLD

AC_BEEP (GPIO1)

tVAL

Note 1, Note 4. and Note 5.

Note 1. tVAL min times with load of: 10 pF cap to ground.

tVAL max times with load of: 50 pF cap ground.

Note 2. Signals are referenced to AC_CLK high-to-low edge.

Note 3. For AC_S_IN2, GPIO12 configured: (Aux In) and Input Enable = 1; Output Enable, AUX_OUT_1, and AUX_OUT_2

= 0.

Note 4. Signal is referenced to LPC_CLK low-to-high edge.

Note 5. For AC_BEEP, GPIO1 configured: AUX_OUT_1 and Output Enable = 1; Open-drain, AUX_OUT_2, and Input En-

able = 0.

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