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SYSRST

CPxx

RCLKEN

PERST

REFCLK

(Either Tri-Stated or Off)

Host Power

(AUXIN)

Host Power

(3.3VIN and 1.5VIN)

Card Power

(AUXIN, 3.3VOUT,

and 1.5VOUT)

Note: Once 3.3 V and 1.5 V are applied, the power switch follows the power-up sequence of Figure 18 or Figure 19.

SYSRST

CPxx

RCLKEN

REFCLK

Host Power

(AUXIN, 3.3VIN, and 1.5VIN)

Card Power

(AUXOUT, 3.3VOUT, and 1.5VOUT)

PERST

c

d

e

a

a

Tpd

Min

Max

Units

a

b

500

c

d

e

500

ns

System Dependent

System Dependent

ns

Load Dependent

TPS2231

TPS2236

SLVS536B – JULY 2004 – REVISED JANUARY 2005

APPLICATION INFORMATION (continued)

Figure 20. Timing Signals - Host System In Standby Prior to Card Insertion

Figure 21. Timing Signals - Host-Controlled Power Down

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