8189ETVRTL8189ETV Просмотр технического описания (PDF) - Realtek Semiconductor

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производитель

8189ETVRTL8189ETV

SINGLE-CHIP IEEE 802.11b/g/n 1T1R WLAN With SDIO INTERFACE

Realtek Semiconductor 

1.8V(IO Power)

3.3V

SD_CLK

SD_CMD

SDIO_RDY

T18Ramp

formal power up

1.4V

T33Ramp

formal power up

2.7V

CMD5 not ready

Tnon_rdy

CMD5/5/3/7 ready

8189ETVRTL8189ETV

Datasheet

CMD52/ 53

Variable definition:

T33ramp: The 3.3V main power ramp up duration

Tnon_rdy: SDIO not ready duration, in this state, RTL8189ES may respond command without ready bit set.

After ready bit set, host will initiate complete card detection procedure.

T18ramp: The 1.8V main power ramp up duration.

The power on flow description:

The ramp up time is specified by T33ramp duration.

After main 3.3V ramp up, the power management unit will be enabled by power ready detection circuit, and

enables SDIO block. Efuse is then autoloaded to SDIO circuits during Tnon_rdy duration. After autoload done,

the SDIO responds command with ready bit set. After CMD5/ 5/ 3/ 7 procedures, the card detection is then

executed. After driver loaded, normal command 52 and 53 are then used.

The typical timing spec is shown as follows:

T33ramp

T18ramp

Tnon-rdy

Table 14. SDIO Interface Power On Timing Parameters

Min

Typical

Max

0.1

0.5

2.5

0.1

0.5

2.5

1

2

10

Unit

ms

ms

ms

 GSPI Interface Power On Sequence

The GSPI interface is enabled automatically when a valid GSPI command is first received. The

recommended power on sequence is as follows:

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller 15

with SDIO Interface

Track ID: JATR-2265-11 Rev. 0.7

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