CS5535 datasheet(548/555 Pages) NSC

548 / 555 page

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548

Revision 0.8

Electrical Specifications (Continued)

6.3.13 GPIO Signaling

The GPIO signals detailed in this sub-section use various

types of buffers depending upon chip configuration. 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).

• GPIO[22:0] signals are referenced to LPC_CLK and

GPIO[28:24] signals are referenced to KHZ32_XCI. Use

low-to-high edge if LPC Clock; use high-to-low edge if

32kHz clock.

• GPIO signal parameters are defined in Figure 6-2 "AC

Reference Timing and Test Definition" on page 530.

Table 6-21. GPIO Signaling

Signal

GPIO[28:24, 22:0]

Parameter

Min

Max

Units

Comment/Condition

GPIO Input [all]

Async Input

No clock reference.

Can be read via programmed I/O.

Can be used as an interrupt or PME.

Note 1 and Note 2.

GPIO Output

[22:16, 13:5, 2:0]

tVAL

Note 2, Note 3, and Note 4. (LPC_CLK)

GPIO Output

[28:25]

tVAL

Note 2, Note 3, and Note 4. (KHZ32_XCI)

GPIO OD Output

high-to-low data

[15:14, 4:3]

tVAL

Note 2, Note 4, and Note 5. (LPC_CLK)

GPIO OD Output

high-to-low data

[24]

tVAL

Note 2, Note 4, and Note 5. (KHZ32_XCI)

GPIO OD Output

low-to-high data

[15:14, 4:3]

tVAL

Note 2, Note 4, and Note 5 (LPC_CLK)

GPIO OD Output

low-to-high data

[24]

tVAL

Note 2, Note 4, and Note 5. (KHZ32_XCI)

Note 1. GPIO configured: Input Enable = 1; AUX_IN, Output Enable, AUX_OUT_1, and AUX_OUT_2 = 0.

Note 2. PIN_OPT_LALL = 0 in Table 2-6 "DIVIL_BALL_OPT" on page 29.

Note 3. tVAL min times with load of: 10 pF cap to ground.

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

Note 4. GPIO configured: AUX_IN, Input Enable, AUX_OUT_1, AUX_OUT_2 = 0; Output Enable = 1; Open-drain = 0.

Note 5. Load per Table 6-15 "SMB Timing Parameters" on page 542.

CS5535 Datasheet(PDF) 548 Page - National Semiconductor (TI)

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