US12231

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

13 of 15

www.unisonic.com.tw

QW-R502-A82.a



EXPRESS CARD TIMING DIAGRAMS(Cont.)

SYSRST

CPxx

Card Power

Host Power

RCLKEN

PERST

Note: Once 3.3V and 1.5V are applied, the power switch follows the power-up sequence of Figure 2 or Figure 3.

Figure 4. Timing Signals - Host System In Standby Prior to Card Insertion

Host Power

Tpd

Min

Max

Units

a

b

c

d

System Dependent

Load Dependent

SYSRST

CPxx

Card Power

Host Power

RCLKEN

PERST

b

a

d

c

Figure 5. Timing Signals - Host - Controlled Power Down

500

500

ns

ns